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Nambu Y, Barker J, Okino Y, Kikkawa T, Shiomi Y, Enderle M, Weber T, Winn B, Graves-Brook M, Tranquada JM, Ziman T, Fujita M, Bauer GEW, Saitoh E, Kakurai K. Observation of Magnon Polarization. Phys Rev Lett 2020; 125:027201. [PMID: 32701305 DOI: 10.1103/physrevlett.125.027201] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
We measure the mode-resolved direction of the precessional motion of the magnetic order, i.e., magnon polarization, via the chiral term of inelastic polarized neutron scattering spectra. The magnon polarization is a unique and unambiguous signature of magnets and is important in spintronics, affecting thermodynamic properties such as the magnitude and sign of the spin Seebeck effect. However, it has never been directly measured in any material until this work. The observation of both signs of magnon polarization in Y_{3}Fe_{5}O_{12} also gives direct proof of its ferrimagnetic nature. The experiments agree very well with atomistic simulations of the scattering cross section.
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Affiliation(s)
- Y Nambu
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - J Barker
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Y Okino
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - T Kikkawa
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- WPI-AIMR, Tohoku University, Sendai 980-8577, Japan
| | - Y Shiomi
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - M Enderle
- Institut Laue-Langevin (ILL), 38042 Grenoble, France
| | - T Weber
- Institut Laue-Langevin (ILL), 38042 Grenoble, France
| | - B Winn
- Oak Ridge National Lab (ORNL), Oak Ridge, Tennessee 37831, USA
| | - M Graves-Brook
- Oak Ridge National Lab (ORNL), Oak Ridge, Tennessee 37831, USA
| | - J M Tranquada
- Brookhaven National Lab (BNL), Upton, New York 11973-5000, USA
| | - T Ziman
- Institut Laue-Langevin (ILL), 38042 Grenoble, France
- Université Grenoble Alpes, CNRS, LPMMC, 38000 Grenoble, France
| | - M Fujita
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - G E W Bauer
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- WPI-AIMR, Tohoku University, Sendai 980-8577, Japan
- Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, Netherlands
| | - E Saitoh
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- WPI-AIMR, Tohoku University, Sendai 980-8577, Japan
- Department of Applied Physics, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - K Kakurai
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan
- Materials Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
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Kocsis V, Nakajima T, Matsuda M, Kikkawa A, Kaneko Y, Takashima J, Kakurai K, Arima T, Kagawa F, Tokunaga Y, Tokura Y, Taguchi Y. Magnetization-polarization cross-control near room temperature in hexaferrite single crystals. Nat Commun 2019; 10:1247. [PMID: 30886147 PMCID: PMC6423030 DOI: 10.1038/s41467-019-09205-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/27/2019] [Indexed: 11/29/2022] Open
Abstract
Mutual control of the electricity and magnetism in terms of magnetic (H) and electric (E) fields, the magnetoelectric (ME) effect, offers versatile low power consumption alternatives to current data storage, logic gate, and spintronic devices. Despite its importance, E-field control over magnetization (M) with significant magnitude was observed only at low temperatures. Here we have successfully stabilized a simultaneously ferrimagnetic and ferroelectric phase in a Y-type hexaferrite single crystal up to 450 K, and demonstrated the reversal of large non-volatile M by E field close to room temperature. Manipulation of the magnetic domains by E field is directly visualized at room temperature by using magnetic force microscopy. The present achievement provides an important step towards the application of ME multiferroics. Mutual control of the electric polarization and magnetization promises for low power consumption spintronic devices but remains challenging. Here the authors show reversal of non-volatile magnetization by electric field as well as the polarization switching by magnetic field in a single-component material, close to room temperature.
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Affiliation(s)
- V Kocsis
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.
| | - T Nakajima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - M Matsuda
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - A Kikkawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - Y Kaneko
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - J Takashima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Engineering R & D Group, NGK Spark Plug Co., Ltd., Minato-ku, Tokyo, 108-8601, Japan
| | - K Kakurai
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan
| | - T Arima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
| | - F Kagawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Applied Physics, University of Tokyo, Hongo, Tokyo, 113-8656, Japan
| | - Y Tokunaga
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
| | - Y Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Applied Physics, University of Tokyo, Hongo, Tokyo, 113-8656, Japan
| | - Y Taguchi
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.
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Nirmala R, Jang KH, Sim H, Cho H, Lee J, Yang NG, Lee S, Ibberson RM, Kakurai K, Matsuda M, Cheong SW, Gapontsev VV, Streltsov SV, Park JG. Spin glass behavior in frustrated quantum spin system CuAl 2O 4 with a possible orbital liquid state. J Phys Condens Matter 2017; 29:13LT01. [PMID: 28140356 DOI: 10.1088/1361-648x/aa5c72] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
CuAl2O4 is a normal spinel oxide having quantum spin, S = 1/2 for Cu2+. It is a rather unique feature that the Cu2+ ions of CuAl2O4 sit at a tetrahedral position, not like the usual octahedral position for many oxides. At low temperatures, it exhibits all the thermodynamic evidence of a quantum spin glass. For example, the polycrystalline CuAl2O4 shows a cusp centered at ~2 K in the low-field dc magnetization data and a clear frequency dependence in the ac magnetic susceptibility while it displays logarithmic relaxation behavior in a time dependence of the magnetization. At the same time, there is a peak at ~2.3 K in the heat capacity, which shifts towards a higher temperature with magnetic fields. On the other hand, there is no evidence of new superlattice peaks in the high-resolution neutron powder diffraction data when cooled from 40 to 0.4 K. This implies that there is no long-ranged magnetic order down to 0.4 K, thus confirming a spin glass-like ground state for CuAl2O4. Interestingly, there is no sign of structural distortion either although Cu2+ is a Jahn-Teller active ion. Thus, we claim that an orbital liquid state is the most likely ground state in CuAl2O4. Of further interest, it also exhibits a large frustration parameter, f = |θ CW/T m| ~ 67, one of the largest values reported for spinel oxides. Our observations suggest that CuAl2O4 should be a rare example of a frustrated quantum spin glass with a good candidate for an orbital liquid state.
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Affiliation(s)
- R Nirmala
- Center for Strongly Correlated Materials Research, Seoul National University, Seoul 08826, Korea. Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, India. Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
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Kira H, Sakaguchi Y, Oku T, Suzuki J, Nakamura M, Arai M, Endoh Y, Chang LJ, Kakurai K, Arimoto Y, Ino T, Shimizu HM, Kamiyama T, Ohoyama K, Hiraka H, Tsutsumi K, Yamada K. Developments of In-Situ SEOP Polarized3He Neutron Spin Filter in Japan. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/294/1/012014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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5
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Sakaguchi Y, Kira H, Oku T, Shinohara T, Suzuki J, Sakai K, Nakamura M, Suzuya K, Aizawa K, Arai M, Takeda M, Endoh Y, Chang LJ, Arimoto Y, Ino T, Shimizu HM, Kamiyama T, Ohoyama K, Hiraka H, Tsutsumi K, Yamada K, Ohara K, Kakurai K. Structure of glasses for3He neutron spin filter cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/294/1/012004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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6
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Kanazawa N, Onose Y, Arima T, Okuyama D, Ohoyama K, Wakimoto S, Kakurai K, Ishiwata S, Tokura Y. Large topological Hall effect in a short-period helimagnet MnGe. Phys Rev Lett 2011; 106:156603. [PMID: 21568591 DOI: 10.1103/physrevlett.106.156603] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Indexed: 05/30/2023]
Abstract
We have observed an unconventional, likely topological, Hall effect over a wide temperature region in the magnetization process of a chiral-lattice helimagnet MnGe. The magnitude of the topological Hall resistivity is nearly temperature-independent below 70 K, which reflects the real-space fictitious magnetic field proportional to a geometric quantity (scalar spin chirality) of the underlying spin texture. From the neutron diffraction study, it is anticipated that a relatively short-period (3-6 nm) noncoplanar spin structure is stabilized from the proper screw state in a magnetic field to produce the largest topological Hall response among the B20-type (FeSi-type) chiral magnets.
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Affiliation(s)
- N Kanazawa
- Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan
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7
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Tokunaga Y, Kaneko Y, Okuyama D, Ishiwata S, Arima T, Wakimoto S, Kakurai K, Taguchi Y, Tokura Y. Multiferroic M-type hexaferrites with a room-temperature conical state and magnetically controllable spin helicity. Phys Rev Lett 2010; 105:257201. [PMID: 21231619 DOI: 10.1103/physrevlett.105.257201] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Indexed: 05/30/2023]
Abstract
Magnetic and magnetoelectric (ME) properties have been studied for single crystals of Sc-doped M-type barium hexaferrites. Magnetization (M) and neutron diffraction measurements revealed that by tuning Sc concentration a longitudinal conical state is stabilized up to above room temperatures. ME measurements have shown that a transverse magnetic field (H) can induce electric polarization (P) at lower temperatures and that the spin helicity is nonvolatile and endurable up to near the conical magnetic transition temperature. It was also revealed that the response (reversal or retention) of the P vector upon the reversal of M varies with temperature. In turn, this feature allows us to control the relation between the spin helicity and the M vectors with H and temperature.
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Affiliation(s)
- Y Tokunaga
- Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), Wako, Saitama 351-0198, Japan
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8
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Fukunaga M, Sakamoto Y, Kimura H, Noda Y, Abe N, Taniguchi K, Arima T, Wakimoto S, Takeda M, Kakurai K, Kohn K. Magnetic-field-induced polarization flop in multiferroic TmMn2O5. Phys Rev Lett 2009; 103:077204. [PMID: 19792682 DOI: 10.1103/physrevlett.103.077204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Indexed: 05/28/2023]
Abstract
We discovered a reversible electric polarization flop from the a axis (P(a)) to the b axis (P(b)) in multiferroic TmMn2O5 below 5 K by applying a magnetic field of approximately 0.5 T along the c axis. This phenomenon is the first example of the rare-earth (R) compound RMn2O5. This magnetic-field-induced polarization flop corresponds to a magnetic phase transition from one incommensurate magnetic (ICM) P(a) phase to another ICM P(b) phase, which is equivalent to an ICM P(b) phase above 5 K under no magnetic field. The spin chirality in the bc plane, which was observed in the P(b) phase by polarized neutron diffraction, disappeared in the ICM P(a) phase. This indicates that the polarization in the ICM phases of TmMn2O5 was induced by an S(i) x S(j)-type interaction.
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Affiliation(s)
- M Fukunaga
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
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9
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Wakimoto S, Kimura H, Ishii K, Ikeuchi K, Adachi T, Fujita M, Kakurai K, Koike Y, Mizuki J, Noda Y, Yamada K, Said AH, Shvyd'ko Y. Charge excitations in the stripe-ordered La5/3Sr1/3NiO4 and La2-x(Ba,Sr)xCuO4 superconducting compounds. Phys Rev Lett 2009; 102:157001. [PMID: 19518667 DOI: 10.1103/physrevlett.102.157001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Indexed: 05/27/2023]
Abstract
Charge excitations in stripe-ordered 214 compounds La_{5/3}Sr_{1/3}NiO_{4} and 1/8-doped La2-x(Ba or Sr)xCuO4 are studied using resonant inelastic x-ray scattering in the hard x-ray regime. We observe = or approximately 1 eV excitation with a momentum transfer corresponding to the charge stripe spatial period both for the diagonal (nickelate) and parallel (cuprates) stripes. They are interpreted as collective stripe excitations or anomalous softening of the charge excitonic modes of the in-gap states.
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Affiliation(s)
- S Wakimoto
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
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10
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Nakajima K, Nakamura M, Kajimoto R, Osakabe T, Kakurai K, Matsuda M, Metoki M, Wakimoto S, Sato TJ, Itoh S, Arai M, Yoshida K, Niita K. Cold-neutron disk-chopper spectrometer at J-PARC. J of Neutron Res 2007. [DOI: 10.1080/10238160601045722] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Chung JH, Matsuda M, Lee SH, Kakurai K, Ueda H, Sato TJ, Takagi H, Hong KP, Park S. Statics and dynamics of incommensurate spin order in a geometrically frustrated antiferromagnet CdCr2O4. Phys Rev Lett 2005; 95:247204. [PMID: 16384420 DOI: 10.1103/physrevlett.95.247204] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2005] [Indexed: 05/05/2023]
Abstract
Using elastic and inelastic neutron scattering we show that a cubic spinel, CdCr2O4, undergoes an elongation along the c axis (c > a = b) at its spin-Peierls-like phase transition at T(N) = 7.8 K. The Néel phase (T < T(N)) has an incommensurate spin structure with a characteristic wave vector Q(M) = (0, delta,1) with delta approximately 0.09 and with spins lying on the ac plane. This is in stark contrast to another well-known Cr-based spinel, ZnCr2O4, that undergoes a c-axis contraction and a commensurate spin order. The magnetic excitation of the incommensurate Néel state has a weak anisotropy gap of 0.6 meV and it consists of at least three bands extending up to 5 meV.
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Affiliation(s)
- J-H Chung
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8552, USA
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12
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Hagiwara M, Regnault LP, Zheludev A, Stunault A, Metoki N, Suzuki T, Suga S, Kakurai K, Koike Y, Vorderwisch P, Chung JH. Spin excitations in an anisotropic bond-alternating quantum s = 1 chain in a magnetic field: contrast to haldane spin chains. Phys Rev Lett 2005; 94:177202. [PMID: 15904331 DOI: 10.1103/physrevlett.94.177202] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2005] [Indexed: 05/02/2023]
Abstract
Inelastic neutron scattering experiments on the S = 1 quasi-one-dimensional bond-alternating antiferromagnet Ni(C9D24N4)(NO2)ClO4 have been performed under magnetic fields below and above a critical field Hc at which the energy gap closes. Normal field dependence of Zeeman splitting of the excited triplet modes below Hc has been observed, but the highest mode is unusually small and smears out with increasing field. This can be explained by an interaction with a low-lying two magnon continuum at q(parallel) = pi that is present in dimerized chains but absent in uniform ones. Above Hc, we find only one excited mode, in stark contrast with three massive excitations previously observed in the structurally similar Haldane-gap material NDMAP [A. Zheludev, Phys. Rev. B 68, 134438 (2003)].
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Affiliation(s)
- M Hagiwara
- RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
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Kajimoto R, Itoh S, Bull M, Kakurai K, Harada I, Arai M, Fujita M, Nishi M. Magnetic Correlations in CuGeO 3. Journal of Neutron Research 2004. [DOI: 10.1080/10238160412331299465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Zheludev A, Kakurai K, Masuda T, Uchinokura K, Nakajima K. Dominance of the excitation continuum in the longitudinal spectrum of weakly coupled Heisenberg S=1/2 chains. Phys Rev Lett 2002; 89:197205. [PMID: 12443146 DOI: 10.1103/physrevlett.89.197205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2002] [Indexed: 05/24/2023]
Abstract
A low-field spin-flop transition in the quasi-one-dimensional antiferromagnet BaCu2Si2O7 is exploited to study the polarization dependence of low-energy magnetic excitations. The measured longitudinal spectrum is best described as a single broad continuum, with no sharp "longitudinal mode," in apparent contradiction with the commonly used chain-mean-field and random phase approximation (MF/RPA) theories. The observed behavior is also quite different than that previously seen in the related KCuF3 material, presumably due to a large difference in the relative strength of interchain interactions. The results highlight the limitations of the chain-MF/RPA approach.
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Affiliation(s)
- A Zheludev
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA.
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15
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Niitaka S, Yoshimura K, Kosuge K, Nishi M, Kakurai K. Partially disordered antiferromagnetic phase in Ca(3)CoRhO(6). Phys Rev Lett 2001; 87:177202. [PMID: 11690305 DOI: 10.1103/physrevlett.87.177202] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2001] [Indexed: 05/23/2023]
Abstract
Neutron diffraction experiments are reported on Ca(3)CoRhO(6) which consists of ferromagnetic Ising spin chains on a triangular lattice. It was first confirmed from temperature dependence of the (110) peak intensity that Ca(3)CoRhO(6) realizes a partially disordered antiferromagnetic state, where 2/3 of the ferromagnetic chains order antiferromagnetically with each other and the remaining 1/3 are left incoherent with the other chains. The 1/3 incoherent ferromagnetic Ising chains freeze to maintain a disordered state at lower temperatures. This compound is successfully discussed as a candidate of a nonequilibrium one-dimensional Ising model.
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Affiliation(s)
- S Niitaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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16
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Cépas O, Kakurai K, Regnault LP, Ziman T, Boucher JP, Aso N, Nishi M, Kageyama H, Ueda Y. Dzyaloshinski-Moriya interaction in the 2D spin gap system SrCu(2)(BO(3))(2). Phys Rev Lett 2001; 87:167205. [PMID: 11690240 DOI: 10.1103/physrevlett.87.167205] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2001] [Indexed: 05/23/2023]
Abstract
The Dzyaloshinski-Moriya interaction partially lifts the magnetic frustration of the spin-1/2 oxide SrCu(2)(BO(3))(2). It explains the fine structure of the excited triplet state and its unusual magnetic field dependence, as observed in previous ESR and new neutron inelastic scattering experiments. We claim that it is mainly responsible for the dispersion. We propose also a new mechanism for the observed ESR transitions forbidden by standard selection rules, which relies on an instantaneous Dzyaloshinski-Moriya interaction induced by spin-phonon couplings.
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Affiliation(s)
- O Cépas
- Institut Laue Langevin, BP 156, F-38042 Grenoble Cedex 9, France
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17
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Sera M, Ichikawa H, Yokoo T, Akimitsu J, Nishi M, Kakurai K, Kunii S. Anomalous temperature dependence of the magnetic field induced antiferromagnetic moment in the antiferroquadrupolar ordered state of CeB6. Phys Rev Lett 2001; 86:1578-1581. [PMID: 11290197 DOI: 10.1103/physrevlett.86.1578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2000] [Indexed: 05/23/2023]
Abstract
The magnetic field induced antiferromagnetic moment M(AF) at low magnetic fields in the antiferroquadrupolar (AFQ) ordered phase of CeB6 was investigated by elastic neutron diffraction experiments for H parallel [110]. The peak intensity at the AF magnetic reciprocal point (1 / 2,1 / 2,1 / 2) corresponding to M(2)(AF) increases with decreasing temperature below the AFQ ordering temperature T(Q), and exhibits a broad maximum at T approximately 3 K and decreases with a further decrease of temperature. This unusual behavior of M(AF) at low fields is explained as a result of the competition between the AF-octupolar and AF-exchange interactions in the O(xy) type AFQ ordered state.
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Affiliation(s)
- M Sera
- Department of Quantum Matter, ADSM, Hiroshima University, Japan
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18
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Zheludev A, Kenzelmann M, Raymond S, Ressouche E, Masuda T, Kakurai K, Maslov S, Tsukada I, Uchinokura K, Wildes A. Energy separation of single-particle and continuum states in an S = 1/2 weakly coupled chains antiferromagnet. Phys Rev Lett 2000; 85:4799-4802. [PMID: 11082655 DOI: 10.1103/physrevlett.85.4799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2000] [Indexed: 05/23/2023]
Abstract
Inelastic neutron scattering is used to study transverse-polarized magnetic excitations in the quasi-one-dimensional S = 1/2 antiferromagnet BaCu2Si2O7, where the saturation value for the Neel order parameter is m(0) = 0.12&mgr;(B) per spin. At low energies the spectrum is totally dominated by resolution-limited spin-wave-like excitations. An excitation continuum sets in above a well-defined threshold frequency. Experimental results are discussed in the context of current theories for weakly interacting quantum half-integer-spin chains.
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Affiliation(s)
- A Zheludev
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
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Kageyama H, Nishi M, Aso N, Onizuka K, Yosihama T, Nukui K, Kodama K, Kakurai K, Ueda Y. Direct evidence for the localized single-triplet excitations and the dispersive multitriplet excitations in SrCu2(BO3)2. Phys Rev Lett 2000; 84:5876-5879. [PMID: 10991077 DOI: 10.1103/physrevlett.84.5876] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/1999] [Indexed: 05/23/2023]
Abstract
We performed inelastic neutron scattering on the 2D Shastry-Sutherland system SrCu2(11BO3)2 with an exact dimer ground state. Three energy levels at around 3, 5, and 9 meV were observed at 1.7 K. The lowest excitation at 3.0 meV is almost dispersionless with a bandwidth of 0.2 meV at most, showing a significant constraint on a single-triplet hopping owing to the orthogonality of the neighboring dimers. In contrast, the correlated two-triplet excitations at 5 meV exhibit a more dispersive behavior.
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Affiliation(s)
- H Kageyama
- Material Design and Characterization Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
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Abe H, Matsuo RJ, Ohshima K, Imai M, Kakurai K. Precursor fluctuations of martensitic phase transition on metallic sodium. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396082414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sato N, Aso N, Hirota K, Komatsubara T, Endoh Y, Shapiro SM, Lander GH, Kakurai K. Anisotropy and two length scales in the magnetic critical scattering in the heavy-fermion superconductor UPd2Al3. Phys Rev B Condens Matter 1996; 53:14043-14046. [PMID: 9983194 DOI: 10.1103/physrevb.53.14043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kakurai K, Sakaguchi T, Nishi M, Zeyen CM, Kashida S, Yamada Y. Dynamics of the strain-mediated phase transition in KDCO3: A thermal neutron spin-echo study. Phys Rev B Condens Matter 1996; 53:R5974-R5977. [PMID: 9982089 DOI: 10.1103/physrevb.53.r5974] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nishi M, Fujita O, Akimitsu J, Kakurai K, Fujii Y. High-pressure effects on the spin-Peierls compound CuGeO3. Phys Rev B Condens Matter 1995; 52:R6959-R6962. [PMID: 9979724 DOI: 10.1103/physrevb.52.r6959] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Itoh S, Endoh Y, Kakurai K, Tanaka H. Quantum spin dynamics of an S=3/2 Heisenberg antiferromagnetic chain: inelastic pulsed neutron scattering from CsVCl3. Phys Rev Lett 1995; 74:2375-2378. [PMID: 10057912 DOI: 10.1103/physrevlett.74.2375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Fujita O, Akimitsu J, Nishi M, Kakurai K. Evidence for a singlet-triplet transition in spin-Peierls system CuGeO3. Phys Rev Lett 1995; 74:1677-1680. [PMID: 10059089 DOI: 10.1103/physrevlett.74.1677] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Uemura YJ, Keren A, Kojima K, Le LP, Luke GM, Wu WD, Ajiro Y, Asano T, Kuriyama Y, Mekata M, Kikuchi H, Kakurai K. Spin fluctuations in frustrated kagomé lattice system SrCr8Ga4O19 studied by muon spin relaxation. Phys Rev Lett 1994; 73:3306-3309. [PMID: 10057343 DOI: 10.1103/physrevlett.73.3306] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Harris QJ, Feng Q, Birgeneau RJ, Hirota K, Kakurai K, Lorenzo JE, Shirane G, Hase M, Uchinokura K, Kojima H, Tanaka I, Shibuya Y. Thermal contraction at the spin-Peierls transition in CuGeO3. Phys Rev B Condens Matter 1994; 50:12606-12610. [PMID: 9975423 DOI: 10.1103/physrevb.50.12606] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abe H, Ishibashi M, Ohshima K, Suzuki T, Wuttig M, Kakurai K. Kinetics of the martensitic transition in In-Tl alloys. Phys Rev B Condens Matter 1994; 50:9020-9024. [PMID: 9974942 DOI: 10.1103/physrevb.50.9020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kohgi M, Osakabe T, Kakurai K, Suzuki T, Haga Y, Kasuya T. Evidence for a magnetic-polaron state in the low-carrier system CeP. Phys Rev B Condens Matter 1994; 49:7068-7071. [PMID: 10009441 DOI: 10.1103/physrevb.49.7068] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abe H, Ohshima K, Suzuki T, Hoshino S, Kakurai K. Neutron-scattering study of metallic sodium. Phys Rev B Condens Matter 1994; 49:3739-3745. [PMID: 10011264 DOI: 10.1103/physrevb.49.3739] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abe H, Ohshima K, Hoshino S, Suzuki T, Kakurai K. Structural fluctuations in metallic sodium. Acta Crystallogr A 1993. [DOI: 10.1107/s0108767378091849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Kakurai K, Shamoto S, Kiyokura T, Sato M, Tranquada JM, Shirane G. Neutron-scattering study of magnetic fluctuations in Zn-substituted YBa2Cu3O6.6. Phys Rev B Condens Matter 1993; 48:3485-3490. [PMID: 10008779 DOI: 10.1103/physrevb.48.3485] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Matsuda M, Yamada K, Kakurai K, Kadowaki H, Thurston TR, Endoh Y, Hidaka Y, Birgeneau RJ, Kastner MA, Gehring PM, Moudden AH, Shirane G. Three-dimensional magnetic structures and rare-earth magnetic ordering in Nd2CuO4 and Pr2CuO4. Phys Rev B Condens Matter 1990; 42:10098-10107. [PMID: 9995265 DOI: 10.1103/physrevb.42.10098] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Thurston TR, Matsuda M, Kakurai K, Yamada K, Endoh Y, Birgeneau RJ, Gehring PM, Hidaka Y, Kastner MA, Murakami T, Shirane G. Antiferromagnetic spin correlations in (Nd,Pr)2-xCexCuO4. Phys Rev Lett 1990; 65:263-266. [PMID: 10042594 DOI: 10.1103/physrevlett.65.263] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Endoh Y, Matsuda M, Yamada K, Kakurai K, Hidaka Y, Shirane G, Birgeneau RJ. Two-dimensional spin correlations and successive magnetic phase transitions in Nd2CuO4. Phys Rev B Condens Matter 1989; 40:7023-7026. [PMID: 9991084 DOI: 10.1103/physrevb.40.7023] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Frikkee E, Kakurai K, Steiner M, Dorner B, Kopinga K. Linear excitations in the S=(1/2 ferromagnetic chain system (C6D11ND3)CuBr3 studied with neutron scattering. Phys Rev B Condens Matter 1989; 40:7011-7018. [PMID: 9991082 DOI: 10.1103/physrevb.40.7011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yamada K, Kakurai K, Endoh Y, Thurston TR, Kastner MA, Birgeneau RJ, Shirane G, Hidaka Y, Murakami T. Spin dynamics in the two-dimensional quantum antiferromagnet La2CuO4. Phys Rev B Condens Matter 1989; 40:4557-4565. [PMID: 9992448 DOI: 10.1103/physrevb.40.4557] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Thurston TR, Birgeneau RJ, Kastner MA, Preyer NW, Shirane G, Fujii Y, Yamada K, Endoh Y, Kakurai K, Matsuda M, Hidaka Y, Murakami T. Neutron scattering study of the magnetic excitations in metallic and superconducting La2-xSrxCuO4-y. Phys Rev B Condens Matter 1989; 40:4585-4595. [PMID: 9992451 DOI: 10.1103/physrevb.40.4585] [Citation(s) in RCA: 96] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Birgeneau RJ, Endoh Y, Hidaka Y, Kakurai K, Kastner MA, Murakami T, Shirane G, Thurston TR, Yamada K. Static and dynamic spin fluctuations in superconducting La2-xSrxCuO4. Phys Rev B Condens Matter 1989; 39:2868-2871. [PMID: 9948565 DOI: 10.1103/physrevb.39.2868] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dorner B, Visser D, Steigenberger U, Kakurai K, Steiner M. Magnetic excitations in the quasi one-dimensional antiferromagnetic singlet groundstate system CsFeBr3. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf01314530] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jyrkkiö TA, Huiku MT, Lounasmaa OV, Siemensmeyer K, Kakurai K, Steiner M, Clausen KN, Kjems JK. Observation of nuclear antiferromagnetic order in copper by neutron diffraction at nanokelvin temperatures. Phys Rev Lett 1988; 60:2418-2421. [PMID: 10038346 DOI: 10.1103/physrevlett.60.2418] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kakurai K, Steiner M. Neutron scattering study on the thermodynamic and dynamic properties of sine-gordon like solitons in CsNiF3. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/s0378-4363(86)80089-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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