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Rivlis R, Zadorozhnyi A, Dahnovsky Y. Giant and negative magnetoresistances in conical magnets in the nonequilibrium Boltzmann equation approach. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 37:015801. [PMID: 39332449 DOI: 10.1088/1361-648x/ad80f1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Accepted: 09/27/2024] [Indexed: 09/29/2024]
Abstract
We study magnetotransport in conical helimagnet crystals using the nonequilibriun Boltzmann equation approach. Spin dependent magnetoresistance exhibits dramatic properties for high and low electron concentrations at different temperatures. For spin up electrons we find negative magnetoresistance despite only considering a single carrier type. For spin down electrons we observe giant magnetoresistance due to depletion of spin down electrons with an applied magnetic field. For spin up carriers, the magnetoresistance is negative, due to the increase in charge carriers with a magnetic field. In addition, we investigate the spin dependent Hall effect. If a magnetic field reaches some critical value for spin down electrons, giant Hall resistance occurs, i.e. Hall current vanishes. This effect is explained by the absence of spin down carriers. For spin up carriers, the Hall constant dramatically decreases with field, due to the increase in spin up electron density. Because of the giant spin dependent magnetoresistance and Hall resistivity, conical helimagnets could be useful in spin switching devices.
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Affiliation(s)
- Raz Rivlis
- Department of Physics and Astronomy/3905, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071, United States of America
| | - Andrei Zadorozhnyi
- Department of Physics, Georgetown University, 37th Street, Washington, DC 20057, United States of America
| | - Yuri Dahnovsky
- Department of Physics and Astronomy/3905, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071, United States of America
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Prayitno TB. Controlling phase transition in monolayer metal diiodides XI 2(X: Fe, Co, and Ni) by carrier doping. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:335803. [PMID: 34102631 DOI: 10.1088/1361-648x/ac0937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/08/2021] [Indexed: 06/12/2023]
Abstract
We applied the generalized Bloch theorem to verify the ground state (most stable state) in monolayer metal diiodides 1T-XI2(X: Fe, Co, and Ni), a family of metal dihalides, using the first-principles calculations. The ground state, which can be ferromagnetic, antiferromagnetic, or spiral state, was specified by a wavevector in the primitive unit cell. While the ground state of FeI2is ferromagnetic, the spiral state becomes the ground state for CoI2and NiI2. Since the multiferroic behavior in the metal dihalide can be preserved by the spiral structure, we believe that CoI2and NiI2are promising multiferroic materials in the most stable state. When the lattice parameter increases, we also show that the ground state of NiI2changes to a ferromagnetic state while others still keep their initial ground states. For the last discussion, we revealed the phase transition manipulated by the hole-electron doping due to the spin-spin competition between the ferromagnetic superexchange and the antiferromagnetic direct exchange. These results convince us that metal diiodides have many benefits for future spintronic devices.
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Affiliation(s)
- Teguh Budi Prayitno
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, Kampus A Jl. Rawamangun Muka, Jakarta Timur 13220, Indonesia
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Anh LD, Okamoto N, Seki M, Tabata H, Tanaka M, Ohya S. Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure. Sci Rep 2017; 7:8715. [PMID: 28821803 PMCID: PMC5562907 DOI: 10.1038/s41598-017-09125-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 07/19/2017] [Indexed: 12/05/2022] Open
Abstract
Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La0.6Sr0.4MnO3 (LSMO)/LaAlO3 (LAO)/Nb-doped SrTiO3 (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]c direction at the LSMO/LAO interface, which is not observed in bulk LSMO. This MA shows unknown behavior that the easy magnetization axis rotates by 90° at an energy of 0.2 eV below the Fermi level in LSMO. We attribute this phenomenon to the transition between the e g and t 2g bands at the LSMO interface. Our finding and approach to understanding the energy dependence of the MA demonstrate a new possibility of efficient control of the interfacial magnetic properties by controlling the band structures of oxide heterostructures.
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Affiliation(s)
- Le Duc Anh
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
- Institute of Engineering Innovation, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
| | - Noboru Okamoto
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Munetoshi Seki
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- Center for Spintronics Research Network (CSRN), The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hitoshi Tabata
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- Center for Spintronics Research Network (CSRN), The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Masaaki Tanaka
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
- Center for Spintronics Research Network (CSRN), The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
| | - Shinobu Ohya
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
- Institute of Engineering Innovation, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
- Center for Spintronics Research Network (CSRN), The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
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Grossin D, Marinel S, Noudem JG. Processing Of La0.8Sr0.2MnO3-δ By Rapid Microwave Heating. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/14328917.2005.11784900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Minamitani E, Roleda R, Diño WA, Kishi T, Nakanishi H, Kasai H. Effect of change in number of conduction electrons on the spin configuration in transition metal oxides. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Matar S, Subramanian M, Weihrich R. Ab initio investigation of the magnetic states of Ca2MnO4 and Ca2MnO3.5. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.10.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ramasesha S, Soos Z. Valence Bond Theory of Quantum Cell Models. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1380-7323(02)80021-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Inoue J, Nonoyama S, Itoh H. Double resonance mechanism of ferromagnetism and magnetotransport in (Ga-Mn)As. PHYSICAL REVIEW LETTERS 2000; 85:4610-4613. [PMID: 11082608 DOI: 10.1103/physrevlett.85.4610] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2000] [Indexed: 05/23/2023]
Abstract
We calculate the electronic states of the Mn-doped semiconductors and show that resonant states are formed at the top of the down spin valence band due to magnetic impurities and that they give rise to a strong and long-ranged ferromagnetic coupling between Mn moments. We propose that the coupling of the resonant states, in addition to the intra-atomic exchange interaction between the resonant and nonbonding states, is the origin of the ferromagnetism of (Ga-Mn)As. The mechanism is thus called "double resonance." The resonant states bring about the spin-dependent resistivity to produce magnetoresistive properties in (Ga-Mn)As and their junctions.
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Affiliation(s)
- J Inoue
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan and and CREST, Japan Science and Technology Corporation (JST), Japan
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Yarlagadda S. Comment on "Spin dependent hopping and colossal negative magnetoresistance in epitaxial Nd0.52Sr0.48MnO3 films in fields up to 50 T". PHYSICAL REVIEW LETTERS 2000; 84:4017. [PMID: 11019266 DOI: 10.1103/physrevlett.84.4017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/1999] [Indexed: 05/23/2023]
Affiliation(s)
- S Yarlagadda
- Saha Institute of Nuclear PhysicsCalcutta, India
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Discontinuous Evolution of the Highly Distorted Orthorhombic Structure and the Magnetic Order in LaMnO3±δ Perovskite. J SOLID STATE CHEM 1999. [DOI: 10.1006/jssc.1999.8386] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sun JZ, Gupta A. SPIN-DEPENDENT TRANSPORT AND LOW-FIELD MAGNETORESISTANCE IN DOPED MANGANITES. ACTA ACUST UNITED AC 1998. [DOI: 10.1146/annurev.matsci.28.1.45] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
▪ Abstract Doped manganite perovskites exhibit large magnetoresistance, but usually only in high fields (>1 Tesla). Efforts are under way to understand the underlying mechanism and to explore possibilities of achieving large magnetoresistance at low fields, which has led to focused studies of spin-dependent transport across macroscopic interfaces between manganites. We review recent experimental progress in this area.
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Affiliation(s)
- J. Z. Sun
- IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
| | - A. Gupta
- IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
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Magnetic Study of OrthomanganitesA1−xMnO3+y(A=La, Eu) with the Perovskite Structure. J SOLID STATE CHEM 1997. [DOI: 10.1006/jssc.1996.7243] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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McIlroy DN, Waldfried C, Zhang J, Choi J, Foong F, Liou SH, Dowben PA. Comparison of the temperature-dependent electronic structure of the perovskites La0.65A0.35MnO3 (A=Ca,Ba). PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:17438-17451. [PMID: 9985868 DOI: 10.1103/physrevb.54.17438] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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O'Donnell J, Onellion M, Rzchowski MS, Eckstein JN, Bozovic I. Magnetoresistance scaling in MBE-grown La0.7Ca0.3MnO3 thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R6841-R6844. [PMID: 9984394 DOI: 10.1103/physrevb.54.r6841] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Müller-Hartmann E, Dagotto E. Electronic Hamiltonian for transition-metal oxide compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R6819-R6822. [PMID: 9984388 DOI: 10.1103/physrevb.54.r6819] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ibarra MR, Blasco J, García J, Marquina C, Algarabel PA, Arnold Z, Kamenev K, Ritter C. Spontaneous behavior and magnetic field and pressure effects on La2/3Ca1/3MnO3 perovskite. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:1187-1193. [PMID: 9985389 DOI: 10.1103/physrevb.54.1187] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Solovyev I, Hamada N, Terakura K. Crucial role of the lattice distortion in the magnetism of LaMnO3. PHYSICAL REVIEW LETTERS 1996; 76:4825-4828. [PMID: 10061390 DOI: 10.1103/physrevlett.76.4825] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ibarra MR, García J, Blasco J, Ritter C, Algarabel PA, Marquina C. Spin-glass insulator state in (Tb-La)2/3Ca1/3MnO3 perovskite. PHYSICAL REVIEW LETTERS 1996; 76:3392-3395. [PMID: 10060955 DOI: 10.1103/physrevlett.76.3392] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Millis AJ. Cooperative Jahn-Teller effect and electron-phonon coupling in La1-xAxMnO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8434-8441. [PMID: 9982345 DOI: 10.1103/physrevb.53.8434] [Citation(s) in RCA: 152] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zang J, Bishop AR, Röder H. Double degeneracy and Jahn-Teller effects in colossal-magnetoresistance perovskites. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:R8840-R8843. [PMID: 9982465 DOI: 10.1103/physrevb.53.r8840] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Oseroff SB, Torikachvili M, Singley J, Ali S, Cheong S, Schultz S. Evidence for collective spin dynamics above the ordering temperature in La1-xCaxMnO3+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:6521-6525. [PMID: 9982052 DOI: 10.1103/physrevb.53.6521] [Citation(s) in RCA: 216] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fontcuberta J, Martínez B, Seffar A, Piñol S, García-Muñoz JL, Obradors X. Colossal magnetoresistance of ferromagnetic manganites: Structural tuning and mechanisms. PHYSICAL REVIEW LETTERS 1996; 76:1122-1125. [PMID: 10061639 DOI: 10.1103/physrevlett.76.1122] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kawano H, Kajimoto R, Kubota M, Yoshizawa H. Canted antiferromagnetism in an insulating lightly doped La1-xSrxMnO3 with x <~ 0.17. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2202-2205. [PMID: 9983710 DOI: 10.1103/physrevb.53.2202] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pickett WE, Singh DJ. Electronic structure and half-metallic transport in the La1-xCaxMnO3 system. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:1146-1160. [PMID: 9983571 DOI: 10.1103/physrevb.53.1146] [Citation(s) in RCA: 104] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kampf AP. Collective excitations in itinerant spiral magnets. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:747-757. [PMID: 9983029 DOI: 10.1103/physrevb.53.747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Coey JM, Viret M, Ranno L, Ounadjela K. Electron localization in mixed-valence manganites. PHYSICAL REVIEW LETTERS 1995; 75:3910-3913. [PMID: 10059762 DOI: 10.1103/physrevlett.75.3910] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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