Hydrogen absorption and its effect on magnetic properties of Nd2Fe14B

• Published in: Journal of magnetism and magnetic materials Vol. 453; pp. 226 - 230
• Main Authors: Bezdushnyi, R., Damianova, R., Tereshina, I.S., Pankratov, N.Yu, Nikitin, S.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2018
• Subjects: Curie temperature; formula omitted; Hydrides; Hydrogen pressure; Spin-reorientation transition; Nd2Fe14B; Hydrides; Hydrogen pressure; Spin-reorientation transition; Curie temperature
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2017.12.102

•Hydrogen absorption procedure was studied in details.•The M(T) was measured under continuous control of hydrogen content in the samples.•Considerably precise values of the Curie temperatures for hydrides was obtained.•Refined magnitudes of the spin-reorientation temperatures for hydrides was reported.•The contributions to the Curie temperature change due to hydrogenation was estimated. Magnetic properties of hydrides of the intermetallic compound Nd2Fe14BHx are investigated in the temperature range covering the Curie temperatures (TC) of the compounds (up to 670 K). The temperature dependencies of magnetization are measured under continuous control of hydrogen content in the investigated samples. The dependencies of Curie and spin-reorientation transition (TSR) temperatures on the hydrogen concentration are studied in detail. The dependence of hydrogen concentration on pressure at a constant temperature (near TC) and on the temperature at various pressures are obtained. We attempted to estimate the contributions of the unit cell volume increase upon hydrogenation and the electronic structure change in the variation of TC of the hydrogenated Nd2Fe14B.