Annealing-induced crystallization of the Er.sub.2./sub.Fe.sub.13.8./sub.B alloy amorphized by irradiation

0448749 - FZÚ 2016 RIV RU eng J - Journal Article
Chukalkin, Y.G. - Teplykh, A. E. - Kudrevatykh, N. V. - Bogdanov, S.G. - Choo, K.N. - Lee, S. - Andreev, Alexander V. - Pirogov, A. N.
Annealing-induced crystallization of the Er₂Fe_13.8B alloy amorphized by irradiation.
Physics of Metals and Metallography. Roč. 116, č. 3 (2015), s. 242-247. ISSN 0031-918X. E-ISSN 1555-6190
R&D Projects: GA ČR GAP204/12/0150
Institutional support: RVO:68378271
Keywords : permanent magnets * amorphous state * isochronous annealing * crystallization * neutron diffraction
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.794, year: 2015

To study the evolution of structural and magnetic states of irradiation_amorphized Er2Fe13.8B alloy during isothermal annealing at temperatures of 295–1025 K, magnetization measurements and neutron diffraction analysis have been performed. The annealing of the alloy leads to the crystallization of the Nd2Fe14B-type phase, its amount reaches about 84% of the sample volume, and Fe (16%). Neutron diffraction studies have shown that the alloy crystallizes in a temperature range of 590–638 K. Magnetic measurements indicate the increase in the spontaneous magnetization and coercive force as the annealing temperature increases above 800 K. The magnetization of the Er sublattice in the sample annealed at 993 K is lower than that of the crystalline sample before its amorphization. However, the magnetic anisotropy of the Er sublattice is unchanged, i.e., the easy axes remain oriented in the basal plane of the tetragonal lattice.
Permanent Link: http://hdl.handle.net/11104/0250385