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Tereshina IS, Kostyuchenko NV, Tereshina-Chitrova EA, Skourski Y, Doerr M, Pelevin IA, Zvezdin AK, Paukov M, Havela L, Drulis H. ThMn 12-type phases for magnets with low rare-earth content: Crystal-field analysis of the full magnetization process. Sci Rep 2018; 8:3595. [PMID: 29483577 PMCID: PMC5827763 DOI: 10.1038/s41598-018-21756-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 02/12/2018] [Indexed: 12/02/2022] Open
Abstract
Rare-earth (R)-iron alloys are a backbone of permanent magnets. Recent increase in price of rare earths has pushed the industry to seek ways to reduce the R-content in the hard magnetic materials. For this reason strong magnets with the ThMn12 type of structure came into focus. Functional properties of R(Fe,T)12 (T-element stabilizes the structure) compounds or their interstitially modified derivatives, R(Fe,T)12-X (X is an atom of hydrogen or nitrogen) are determined by the crystal-electric-field (CEF) and exchange interaction (EI) parameters. We have calculated the parameters using high-field magnetization data. We choose the ferrimagnetic Tm-containing compounds, which are most sensitive to magnetic field and demonstrate that TmFe11Ti-H reaches the ferromagnetic state in the magnetic field of 52 T. Knowledge of exact CEF and EI parameters and their variation in the compounds modified by the interstitial atoms is a cornerstone of the quest for hard magnetic materials with low rare-earth content.
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Affiliation(s)
- I S Tereshina
- Faculty of Physics, Lomonosov Moscow State University, 119991, Moscow, Russia.
| | - N V Kostyuchenko
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region, 9 Institutsky Per., Dolgoprudny, 141700, Russia
- Institut für Festkörperphysik, Technische Universität Wien, Vienna, Austria
| | | | - Y Skourski
- Hochfeld-Magnetlabor Dresden (HLD), Helmholtz-Zentrum Dresden-Rossendorf, D-01314, Dresden, Germany
| | - M Doerr
- Technische Universität Dresden, D-01062, Dresden, Germany
| | - I A Pelevin
- Baikov Institute of Metallurgy and Materials Science RAS, 119991, Moscow, Russia
| | - A K Zvezdin
- A. M. Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, 38 Vavilov Str., 119991, Russia
- National Research University Higher School of Economics, Myasnitskaya 20, Moscow, 101000, Russia
| | - M Paukov
- Faculty of Mathematics and Physics, Charles University, Prague, 12116, Czech Republic
- Immanuel Kant Baltic Federal University, Kaliningrad, 236016, Russia
| | - L Havela
- Faculty of Mathematics and Physics, Charles University, Prague, 12116, Czech Republic
| | - H Drulis
- Faculty of Mathematics and Physics, Charles University, Prague, 12116, Czech Republic
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950, Wroclaw, Poland
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Gorbunov DI, Yasin S, Andreev AV, Skourski Y, Arnold Z, Zherlitsyn S, Wosnitza J. High-field magnetization and magnetoelasticity of single crystalline HoFe5Al7. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:136001. [PMID: 24625813 DOI: 10.1088/0953-8984/26/13/136001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Magnetization and ultrasound measurements have been performed in pulsed magnetic fields up to 60 T on a ferrimagnetic HoFe5Al7 single crystal (Curie temperature TC = 216 K, compensation point Tcomp = 65 K) with a tetragonal crystal structure of the ThMn12-type. The compound exhibits a high magnetic anisotropy of the easy-plane type. A large anisotropy is also observed within the basal plane having an easy-magnetization direction along the [110] axis with the spontaneous magnetic moment Ms = 2 µB/f.u. at T = 2 K. Along the easy axis, two first-order field-induced magnetic transitions are observed. At both transitions sharp anomalies in the acoustic properties are found. The critical fields of the transitions depend on temperature in a different manner. Within molecular-field theory and using the high-field magnetization data the Ho-Fe inter-sublattice exchange parameter has been determined to be nHoFe ≈ 4 T/µB. The magnetoelasticity has also been probed by magnetization measurements under hydrostatic pressure. TC decreases with a rate dTC/dp = -10 K/GPa, whereas Tcomp increases with dTcomp/dp = 3.5 K/GPa.
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Affiliation(s)
- D I Gorbunov
- Institute of Physics, Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic. Department of Condensed Matter Physics, Charles University, Ke Karlovu 5, 121 16 Prague, Czech Republic
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Kuz'min MD, García LM, Artigas M, Bartolomé J. ac susceptibility of a DyFe11Ti single crystal. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4093-4100. [PMID: 9986311 DOI: 10.1103/physrevb.54.4093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kou XC, Grössinger R, Wiesinger G, Liu JP, Kleinschroth I, Kronmüller H. Intrinsic magnetic properties of RFe10Mo2 compounds (R=Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, or Tm). PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8254-8265. [PMID: 9977435 DOI: 10.1103/physrevb.51.8254] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hu BP, Wang KY, Wang YZ, Wang ZX, Yan QW, Zhang PL, Sun XD. Structure and magnetic properties of RFe11.35Nb0.65 and RFe11.35Nb0.65Ny (R=Y, Sm, Gd, Tb, Dy, Ho, Er, and Lu). PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:2905-2919. [PMID: 9979067 DOI: 10.1103/physrevb.51.2905] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kuz'min MD, Coey JM. Magnetocrystalline anisotropy of 3d-4f intermetallics: Breakdown of the linear theory. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:12533-12539. [PMID: 9975413 DOI: 10.1103/physrevb.50.12533] [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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Nagamine LC, Rechenberg HR, Algarabel PA, Ibarra MR. Magnetic phase diagram of (DyxGd1-x)Fe11Ti alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:12659-12664. [PMID: 9975429 DOI: 10.1103/physrevb.50.12659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kou XC, Zhao TS, Grössinger R, Kirchmayr HR, Li X. Magnetic phase transitions, magnetocrystalline anisotropy, and crystal-field interactions in the RFe11Ti series (where R=Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, or Tm). PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:3231-3242. [PMID: 10006408 DOI: 10.1103/physrevb.47.3231] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Franse J, Radwański R. Chapter 5 Magnetic properties of binary rare-earth 3d-transition-metal intermetallic compounds. HANDBOOK OF MAGNETIC MATERIALS 1993. [DOI: 10.1016/s1567-2719(05)80046-0] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Christides C, Anagnostou M, Li HS, Kostikas A, Niarchos D. Spin-reorientation transitions and crystalline-electric-field parameters in RFe10T2 (R=rare earth; T=Si or V) intermetallic compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:2182-2189. [PMID: 9999767 DOI: 10.1103/physrevb.44.2182] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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