Novel pressure-induced magnetic transition in magnetite (Fe3O4)

Yang Ding*, Daniel Haskel, Sergei G. Ovchinnikov, Yuan-Chieh Tseng, Yuri S. Orlov, Jonathan C. Lang, Ho Kwang Mao

*此作品的通信作者

研究成果: Article同行評審

76 引文 斯高帕斯(Scopus)

摘要

Fe K-edge x-ray magnetic circular dichroism of magnetite (Fe3O4) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic dichroism was observed to decrease discontinuously by ∼50% between 12 and 16 GPa, independent of temperature. The magnetic transition is attributed to a high-spin to intermediate-spin transition of Fe2+ ions in the octahedral sites and could account for previously observed structural and electrical anomalies in magnetite at this pressure range. The interpretation of x-ray magnetic circular dichroism data is supported by x-ray emission spectroscopy and theoretical cluster calculations.

原文English
文章編號045508
期刊Physical Review Letters
100
發行號4
DOIs
出版狀態Published - 1 二月 2008

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