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journal article·2018-12-01Open access

Probing the exchange coupling in the complex modified Ho-Fe-B compounds by high-field magnetization measurements

I. S. Tereshina, A. P. Pyatakov, E. A. Tereshina-Chitrova, D. I. Gorbunov, Yu. Skourski, J. M. Law, M. A. Paukov, L. Havela, M. Doerr, A. K. Zvezdin, A. V. Andreev

AIP Advances· Volume 8· Issue 12
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Source abstract

Abstract

By examining the Ho2Fe14B case, we explored the influence of substitution and absorption atoms on the high-field behavior of magnetization of rare-earth (R)-Fe intermetallics. The value of the first critical field shows that the inter-sublattice exchange interactions remain practically unchanged when the substitution takes place in the R sublattice (replacement of up to 50 % of Ho by Nd). On the contrary, hydrogen absorption by Ho2Fe14B and Ho1Nd1Fe14B of the maximum possible hydrogen concentration 5.5 at./f.u. decreases the strength of the R-Fe exchange by 30%. Remarkably, the influence of hydrogenation is stronger in the compound modified by substitution.
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Research context

Metals & alloys

OpenAlex topics: Magnetic Properties of Alloys · Hydrogen Storage and Materials · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Faculty of Physics, Lomonosov Moscow State University 1 , 119991 Moscow, Russia

Institute of Physics, ASCR 2 , 18221 Prague, Czech Republic

Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf 3 , D-01314 Dresden, Germany

Faculty of Mathematics and Physics, Charles University 4 , 12116 Prague, Czech Republic

Technische Universität Dresden 5 , D-01062 Dresden, Germany

Immanuel Kant Baltic Federal University 6 , 236016 Kaliningrad, Russia

Prokhorov General Physics Institute, RAS 7 , 119991 Moscow, Russia

Funding

Russian Science Foundation

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