论文成果
Anomalous second ferromagnetic phase transition as a signature of spinodal decomposition in Fe-doped GeTe diluted magnetic semiconductor
发布时间：2023-08-21 点击次数：
论文类型：期刊论文
第一作者：童非
通讯作者：缪向水,HAO.J.H
合写作者：童浩,GAO.G.Y,Chen.Z.P
发表刊物：Applied Physics Letters
所属单位：香港理工大学、华中科技大学
学科门类：工学
一级学科：电子科学与技术
文献类型：J
卷号：99
期号：20
页面范围：202508
DOI码：10.1063/1.3663550
发表时间：4086-05-01
摘要：Structural and magnetic properties of diluted magnetic semiconductor Ge1-xFexTe thin films are
investigated. The conventional structure analysis shows c-axis orientation with columnar growth of
the films and no indication of Fe clusters or second phase. Magnetic measurements combined with
theory models reveal that two ferromagnetic phase transitions occur. We consider that the second
ferromagnetic phase transition in high Fe content thin film is from a ferromagnetic phase with long
range exchange interaction to a superparamagnetic phase with dipole interaction between
Fe clusters, which can be viewed as a signature of spinodal decomposition in Ge1-xFexTe material.
发布期刊链接：https://pubs.aip.org/aip/apl/article/99/20/202508/385150