期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 22, 期 18, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/22/18/185702
关键词
-
资金
- Carnegie/Department of Energy (DOE) Alliance Center (CDAC) [DE-FC52-08NA28554]
- DOE-Basic Energy Sciences, Division of Materials Sciences and Engineering
We have investigated structural and magnetic phase transitions under high pressures in a quaternary rare-earth transition-metal arsenide oxide NdCoAsO compound that is isostructural to the high temperature superconductor parent phase NdFeAsO. The four-probe electrical resistance measurements carried out in a designer diamond anvil cell show that the ferromagnetic Curie temperature and antiferromagnetic Neel temperature increase with an increase in pressure. High pressure x-ray diffraction studies using a synchrotron source show a structural phase transition from a tetragonal phase to a new crystallographic phase at a pressure of 23 GPa at 300 K. The NdCoAsO sample remained antiferromagnetic and non-superconducting down to 10 K and up to the highest pressure achieved in this experiment, 53 GPa. A P-T phase diagram for NdCoAsO is presented from ambient conditions to P = 53 GPa and T = 10 K.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据