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Crossover from Positive to Negative Colossal Magnetoresistance

Crossover from Positive to Negative Colossal Magnetoresistance
从正巨磁阻到负巨磁阻的交叉
批准号：
EP/D505429/2
负责人：
Mark Green
金额：
$0.0万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
项目状态：
已结题
起止时间：
2007 至 --
来源：
https://gtr.ukri.org/projects?ref=EP%2FD505429%2F2
关键词：
CrossoverPositiveNegativeColossalMagnetoresistance

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英文摘要
In the past few years, the study of colossal magnetoresistance has unveiled fascinating new physics that has had a major impact on the understanding of strongly correlated electron systems. This proposal outlines research to investigate a new mechanism for colossal magnetoresistance (CMR) recently discover in doped ZnCr2Se4, which is vastly different to that reported for both manganate perovskites and pyrochlores, with a significant effect observed in low fields as well as an unprecedented crossover from positive to negative colossal magnetoresistance (MR > 90 %) as a function of both field and temperature.
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