Negative Thermal Expansion of the Dy2Fe16Cr Compound

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 41-43
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0256-307X/36/6/066501

摘要

Structural,thermal expansion,and magnetic properties of the Dy2Fe16Cr compound are investigated by means of x-ray diffraction and magnetization measurements.The Dy2Fe16Cr compound has a hexagonal Th2Ni17-type structure.There exists a negative thermal expansion resulting from a strong spontaneous magnetostriction in the magnetic state of the Dy2Fe16Cr compound.The average thermal expansion coefficient is-0.794 × 10-5/K in the temperature range 292-407K.The spontaneous magnetostrictive deformation and the Curie temperature are discussed.