Influence of 1523 K annealing on phase and magnetic properties in (Gd1 − xEr x )5Si2Ge2 compounds
Source abstract
Abstract
The (Gd1 − xErx)5Si2Ge2 (x = 0, 0·05, 0·1, 0·15 and 0·2) compounds were prepared from the high purity Gd metal (3 N) by arc melting, and then annealed at 1523 K (3 h). The phase, microstructure, Curie temperatures, magnetic hysteresis loss, and magnetocaloric effects were investigated. All samples retain the monoclinic Gd5Si2Ge2 type structure. The temperature of magnetic transition decreases linearly from 281 K to 177 K with the increase of Er content from x = 0–0·2. Because the (Gd1 − xErx)5Si2Ge2 compounds keep the typical first-order structural/magnetic transition, they display large magnetic entropy near their magnetic transition temperatures. The maximum magnetic entropy change of (Gd1 − xErx)Si2Ge2 compounds in the low magnetic field of 0~2·0 T are 15·5, 16·1, 15·3 and 15·2 J/kg K for x = 0·05, 0·1, 0·15 and 0·2, respectively.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Rare-earth and actinide compounds · Iron-based superconductors research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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