Colossal magnetoresistance is a Griffiths singularity
Colossal magnetoresistance is a Griffiths singularity
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DOI：
10.1103/physrevlett.88.197203
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发表时间：
2002-05-13
影响因子：
8.6
通讯作者：
Chun, SH
中科院分区：
文献类型：
--
作者：
Salamon, MB;Lin, P;Chun, SH
目前普遍认为，掺杂锰氧化物中表现出大磁电阻的磁转变是一种渗流效应。本文表明，过渡应被视为在格里菲斯阶段的上下文中出现时，无序抑制磁过渡。这种方法解释了La0.7Ca0.3MnO单晶的磁化率和热容数据的不寻常方面（3）。
It is now widely accepted that the magnetic transition in doped manganites that show large magnetoresistance is a type of percolation effect. This paper demonstrates that the transition should be viewed in the context of the Griffiths phase that arises when disorder suppresses a magnetic transition. This approach explains unusual aspects of susceptibility and heat capacity data from a single crystal of La0.7Ca 0.3MnO (3) .