Current-induced persistent magnetization in a relaxorlike manganite
Current-induced persistent magnetization in a relaxorlike manganite
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DOI：
10.1063/1.2897299
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发表时间：
2008-03
影响因子：
4
通讯作者：
H. Sakai;Y. Tokura
中科院分区：
文献类型：
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作者：
H. Sakai;Y. Tokura
掺铁量为7%的（La0.7Pr0.3）0.65Ca0.35MnO3单晶是一种典型的弛豫铁磁体，铁磁金属团簇和电荷轨道有序绝缘团簇共存，其体积分数可通过外界刺激控制。在那里，作为辅助区的电流激发可以产生持续的FM态，其中每Mn增加0.4μB。与磁场中的电流加热效应（其相反地导致FM分数降低）的明显区别使我们能够通过施加具有不同幅度的电压来双向切换磁化和电阻。
A single crystal of 7% Fe-doped (La0.7Pr0.3)0.65Ca0.35MnO3 shows up as a typical relaxor ferromagnet, where ferromagnetic metallic (FM) and charge-orbital-ordered insulating clusters coexist with controllable volume fraction by external stimuli. There, the persistent FM state can be produced by an electric-current excitation as the filamentary region, the magnetization in which is increased by ∼0.4μB per Mn. A clear distinction from the current heating effect in a magnetic field, which conversely leads to a decrease in FM fraction, enables us to bidirectionally switch both the magnetization and resistance by applying the voltages with different magnitudes.