Single crystals of a series of hydrides Er2Fe14BHx (x ≤ 2.5) have been produced and studied in pulsed magnetic fields up to 60 T. The magnetization curve of Er2Fe14B in the easy direction [100] features a stepwise anomaly at about 45 T, corresponding to the first-order phase transition. A similar magnetization jump is also present in the curve along [110], but at a higher field, ∼52 T. The [100] data of the parent and hydrogen-charged Er2Fe14BHx with x = 0.25, 1.5, 2.5 were used to deduce the Er-Fe molecular field Hmol as a function of hydrogen content x. After moderate initial decrease, Hmol(x) drops abruptly above x = 1.5. Hydrogenation results in a 12% reduction of the Er-Fe molecular field in Er2Fe14BH2.5 as compared to Er2Fe14B. For reference, influence of hydrogen on Hmol in an Er2Fe17-H system is also presented.
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1 May 2012
Research Article|
May 14 2012
Variation of the intersublattice exchange coupling due to hydrogen absorption in Er2Fe14B: A high-field magnetization study
E. A. Tereshina;
E. A. Tereshina
1
Institute of Physics ASCR
, 18221 Prague, Czech Republic
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I. S. Tereshina;
I. S. Tereshina
2
Baikov Institute of Metallurgy and Materials Science RAS
, 119991 Moscow, Russia
3
International Laboratory of High Magnetic Fields and Low Temperatures
, 53-421 Wroclaw, Poland
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M. D. Kuz’min;
M. D. Kuz’min
4
Leibniz-Institut für Festkörper- und Werkstoffforschung
, PF 270116, D-01171 Dresden, Germany
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Y. Skourski;
Y. Skourski
5
Dresden High Magnetic Field Laboratory
, Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany
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M. Doerr;
M. Doerr
6
Technische Universität Dresden, Institut für Festkörperphysik
, D-01062 Dresden, Germany
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O. D. Chistyakov;
O. D. Chistyakov
2
Baikov Institute of Metallurgy and Materials Science RAS
, 119991 Moscow, Russia
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I. V. Telegina;
I. V. Telegina
7
Lomonosov Moscow State University
, Faculty of Physics, 119991 Moscow, Russia
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H. Drulis
H. Drulis
8
Institute of Low Temperature and Structure Research PAS
, 50-950 Wroclaw, Poland
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E. A. Tereshina
1
I. S. Tereshina
2,3
M. D. Kuz’min
4
Y. Skourski
5
M. Doerr
6
O. D. Chistyakov
2
I. V. Telegina
7
H. Drulis
8
1
Institute of Physics ASCR
, 18221 Prague, Czech Republic
2
Baikov Institute of Metallurgy and Materials Science RAS
, 119991 Moscow, Russia
3
International Laboratory of High Magnetic Fields and Low Temperatures
, 53-421 Wroclaw, Poland
4
Leibniz-Institut für Festkörper- und Werkstoffforschung
, PF 270116, D-01171 Dresden, Germany
5
Dresden High Magnetic Field Laboratory
, Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany
6
Technische Universität Dresden, Institut für Festkörperphysik
, D-01062 Dresden, Germany
7
Lomonosov Moscow State University
, Faculty of Physics, 119991 Moscow, Russia
8
Institute of Low Temperature and Structure Research PAS
, 50-950 Wroclaw, Poland
J. Appl. Phys. 111, 093923 (2012)
Article history
Received:
February 06 2012
Accepted:
March 28 2012
Citation
E. A. Tereshina, I. S. Tereshina, M. D. Kuz’min, Y. Skourski, M. Doerr, O. D. Chistyakov, I. V. Telegina, H. Drulis; Variation of the intersublattice exchange coupling due to hydrogen absorption in Er2Fe14B: A high-field magnetization study. J. Appl. Phys. 1 May 2012; 111 (9): 093923. https://doi.org/10.1063/1.4716007
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