新型三元 RE2PtGe3 化合物（RE = Tb、Dy、Ho）中的簇自旋玻璃行为

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Express Pub Date : 2024-09-08 DOI:10.1088/2053-1591/ad7444

L S Litzbarski, M J Winiarski, I Oshchapovsky, P Skokowski, K Synoradzki, T Klimczuk and B Andrzejewski

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引用次数: 0

摘要

利用电弧熔融技术合成了两种新的三元锗化物 Tb2Pt1.2Ge2.8、Dy2Pt1.15Ge2.85 和一种已知的锗 Ho2Pt1.1Ge2.9。用粉末 X 射线衍射法对所获得的样品进行了研究，结果表明，所有这些样品都结晶成具有 P6/mmm（编号 191）空间群的六边形结构。这种结构是 AlB2 芳构型的无序变体，有利于形成类似自旋玻璃的状态。通过测量磁感应强度、热容量和电阻，研究了这些化合物的物理性质。实验表明，所有化合物都可归类为团簇自旋玻璃，Tb2Pt1.2Ge2.8、Dy2Pt1.15Ge2.85 和 Ho2Pt1.1Ge2.9 的凝固温度分别为 Tf = 12.0 K、Tf = 6.0 K 和 Tf = 2.9 K。

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Cluster-spin-glass behavior in new ternary RE2PtGe3 compounds (RE = Tb, Dy, Ho)

Two new ternary germanides Tb2Pt1.2Ge2.8, Dy2Pt1.15Ge2.85 and one already known germanium Ho2Pt1.1Ge2.9.were synthesized using an arc melting technique. The obtained samples were investigated by powder x-ray diffraction, which indicated that all of them crystallized in a hexagonal structure with P6/mmm (no. 191) space group. This structure is a disordered variant of the AlB2 aristotype that favors the formation of a spin-glass-like state. The physical properties were examined by measuring magnetic susceptibility, heat capacity and electrical resistance. Experiments indicated that all of the compounds can be classified as cluster-spin-glasses with the freezing temperature of Tf = 12.0 K, Tf = 6.0 K and Tf = 2.9 K for Tb2Pt1.2Ge2.8, Dy2Pt1.15Ge2.85 and Ho2Pt1.1Ge2.9 respectively.

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来源期刊

Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

4.30%

发文量

640

审稿时长

12 weeks

期刊介绍： A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.