作者: F. Pourarian , W.E. Wallace , S.K. Malik
DOI: 10.1016/0022-5088(82)90173-4
关键词: Cobalt 、 Curie temperature 、 Magnetic moment 、 Hydrogen 、 Laves phase 、 Formula unit 、 Magnetization 、 Moment (physics) 、 Condensed matter physics 、 Chemistry
摘要: Abstract The Laves phase compounds RCo2−xFex (R ≡ Tb, Dy and x = 0, 0.6 2) are found to absorb about 3–3.5 hydrogen atoms per formula unit. absorption results in a large increase cell volume (about 20%–25%) without change the structure. Detailed magnetization studies on parent hydrides have been carried out temperature interval 4.2–300 K. From these measurements it is inferred that leads reduction cobalt magnetic moment TbCo2 DyCo2 but an iron TbFe2 DyFe2 as well cobalt-rich ternaries TbCo1.4Fe0.6 DyCo1.4Fe0.6. Magnetization of all at 4.2 K shows no tendency saturate even fields up 20 kOe. This suggests possible fanning rare earth moments due weakening RCo RFe exchange. A from first-order transition Curie second order, hydrogenation, observed.