Abstract The magnetization of hydrides based on GdCo 5 and YCo 5 has been investigated as a function of hydrogen composition and temperature between 4.2 and 400 K under the direct influence of hydrogen. Hydrogenabsorption leads to a reduction in the Co moment and weakenings in the Co-Co and the Co-Gd exchange interactions.
摘要 在氢气的直接影响下,研究了基于 GdCo 5 和 YCo 5 的氢化物的磁化强度与氢成分和 4.2 至 400 K 之间的温度的函数关系。氢吸收导致 Co 矩的降低和 Co-Co 和 Co-Gd 交换相互作用的减弱。
Thermoreversible permanent magnets in the quasibinary GdCo5−xCux system
作者:R. M. Grechishkin、M. S. Kustov、O. Cugat、J. Delamare、G. Poulin、D. Mavrudieva、N. M. Dempsey
DOI:10.1063/1.2347282
日期:2006.9.18
Ferrimagnetic GdCo5−xCux alloys exhibiting the effect of Gd- and 3d-sublattice magnetization compensations at defined temperatures were studied with respect to their use as thermoreversiblepermanentmagnets (PMs). Coercive fields μ0Hc in the range of 0.3–1.6T were measured for annealed single crystals with x=1–2.2 having compensation points in the vicinity of room temperature. Two applications of
Yermakov, Physics of Metals and Metallography, 1991, vol. 72, # 5, p. 1 - 39
作者:Yermakov
DOI:——
日期:——
Thermal expansion and spontaneous magnetostriction of RCo5 intermetallic compounds
作者:A.V. Andreev、S.M. Zadvorkin
DOI:10.1016/0921-4526(91)90011-3
日期:1991.7
Thermal expansion of RCo5 compounds (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho) is investigated by X-ray diffractometry on single crystalline samples in the temperature range 5-1300 K. All compounds undergo large spontaneous magnetostrictive deformations, the volume effect reaches 3.2 x 10(-2) at 5 K in HoCo5.5. The contributions to the volume effect from Co-Co and R-Co exchange interactions are determined by comparison with YCo5, Y being the nonmagnetic analogue of R.
Solid-state phase equilibria in the Gd–Co–Al ternary system at 1173K
作者:Bo Zhou、Zhengfei Gu、Junqin Li、Gang Cheng、Jun Cheng、Chengfu Xu、Lei Ma
DOI:10.1016/j.jallcom.2006.04.061
日期:2007.3
A portion of the isothermal section (1173 K) of the phase diagram of the Gd-Co-Al ternary system (up to 33.3 at.% Gd) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS) techniques. Fourteen single-phase regions (including solid solution regions of the binary compounds), twenty-five two-phase regions and twelve three-phase regions were found to exist at this isothermal section. In the GdCo2-GdAl2 system, the existence of the GdCo0.74Al1.26 phase is identified and it has a composition range of 30-45 at.% Al, the maximum solid solubility of Al in GdCo, is about 15 at.%, and Co in GdAl2, is about 16 at.%. Besides, the maximum solid solubility of Al in Co, Gd2Co17 and GdCo5 is about 6, 17 and 25 at.%, respectively, the maximum solid solubility of Gd in Co, CoAl is below 2 at.% and the solid solubility range is from 47 to 61 at.% Al in CoAl phase. In this work, no new ternary compounds were observed. (c) 2006 Elsevier B.V. All rights reserved.