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首页> 外文期刊>Physica, B. Condensed Matter >Effect of Cr doping on the magnetic and electrical transport properties of charge-ordered Bi0.5Ca0.5MnO3
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Effect of Cr doping on the magnetic and electrical transport properties of charge-ordered Bi0.5Ca0.5MnO3

机译：Cr掺杂对电荷有序Bi0.5Ca0.5MnO3的磁和电输运性质的影响

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摘要

An experimental study on the magnetic and electrical transport properties of the manganites Bi0.5Ca0.5Mn1-xCrxO3 (BCMCO) (0 <= x <= 0.12) is carried out. The results show that Cr doping can suppress the charge-ordering transition, favoring the ferromagnetic clusters. For x = 0.12, the charge-ordering transition disappears but a very broad paramagnetic-ferromagnetic-like transition is detected at the Curie temperature T-C = 72.6 K. It is caused by phase separation or coexistence of the charge-ordering and ferromagnetic phase. Moreover, the critical Cr content to destroy charge ordering phase in BCMCO does not match the general monotonous tendencies shown by Cr-doped Re0.5Ca0.5MnO3 (Re-rare-earth). These differences are ascribed to the fact that the ground state in BCMCO differs markedly from the ferromagnetic metallic phase in Cr-doped Re0.5Ca0.5MnO3 compounds.
机译：对锰Bi0.5Ca0.5Mn1-xCrxO3（BCMCO）（0 <= x <= 0.12）的磁和电输运性质进行了实验研究。结果表明，Cr掺杂可以抑制电荷有序跃迁，有利于铁磁簇。当x = 0.12时，电荷序跃迁消失，但在居里温度T-C = 72.6 K时检测到非常宽的顺磁-铁磁样跃迁。这是由于相序分离或电荷序与铁磁相共存引起的。此外，破坏BCMCO中的电荷有序相的临界Cr含量与掺Cr的Re0.5Ca0.5MnO3（稀土）显示的一般单调趋势不匹配。这些差异归因于以下事实：BCMCO中的基态与Cr掺杂的Re0.5Ca0.5MnO3化合物中的铁磁金属相明显不同。

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