The magnetocaloric effect in hydrogen-doped Nd2Fe14B and Er2Fe14B intermetallic compounds


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Abstract

The nature of the magnetocaloric effect (MCE) in compounds R2Fe14B (R = Nd, Er) and their hydrides in a wide temperature range is investigated. The investigation is carried out on initial samples of a special purity including single-crystalline ones. The highest value of the magnetocaloric effect is established in the Curie-temperature region. The hydrogenation of samples affects the value of the MCE. The model explaining the dependence of the value and sign of the magnetocaloric effect on the hydrogen contents in R2Fe14B compounds with participation of erbium and neodymium is proposed.

About the authors

G. S. Burkhanov

Baikov Institute of Metallurgy and Material Science

Email: gpolitova@gmail.com
Russian Federation, Moscow, 119991

I. S. Tereshina

Baikov Institute of Metallurgy and Material Science; Moscow State University; International Laboratory of Strong Magnetic Fields and Low Temperatures

Email: gpolitova@gmail.com
Russian Federation, Moscow, 119991; Moscow, 119991; Wrocław

G. A. Politova

Baikov Institute of Metallurgy and Material Science

Author for correspondence.
Email: gpolitova@gmail.com
Russian Federation, Moscow, 119991

I. A. Pelevin

Baikov Institute of Metallurgy and Material Science

Email: gpolitova@gmail.com
Russian Federation, Moscow, 119991

Yu. S. Koshkidko

International Laboratory of Strong Magnetic Fields and Low Temperatures

Email: gpolitova@gmail.com
Poland, Wrocław

M. A. Paukov

Karlov University

Email: gpolitova@gmail.com
Czech Republic, Prague, 11636

H. Drulis

Institute of Low Temperatures and Structural Research

Email: gpolitova@gmail.com
Poland, Wrocław

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