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首页> 外文期刊>Physica status solidi, B. Basic research >Magnetic peculiarity and crystal structure of Pr_(0.55)Sr_(0.5)Co_(1-x)Fe_xO_3
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Magnetic peculiarity and crystal structure of Pr_(0.55)Sr_(0.5)Co_(1-x)Fe_xO_3

机译：Pr_（0.55）Sr_（0.5）Co_（1-x）Fe_xO_3的磁特性和晶体结构

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摘要

Crystal structure and magnetic properties of the Pr_(0.5)Sr_(0.5)Co_(1-x)Fe_xO_(3-d) are studied to clarify an origin of the magnetic peculiarity observed for Pr_(0.5)Sr_(0.5)CoO_(3-d) compound near T_A= 120 K. A correlation between crystal symmetry, magnetic structure, and the magnetic anomaly is discussed. At room temperature the compounds with x < 0.67 have orthorhombic crystal structure described by Imma space group. Crystal symmetry of these compounds reduces down to monoclinic (triclinic) one with a temperature decrease, whereas the crystal structure of the solid solutions with x> 0.7 remains orthorhombic at low temperatures. Increase of Fe percentage changes the magnetic properties of the compounds from ferromagnetic to cluster spin-glass, spin glass and then to antiferromagnetic one. An existence of the magnetic feature is strongly dependent on the magnetic state of the compounds. The data obtained specify that a rearrangement of the bond lengths in rare-earth sublattice is responsible for the crystal structure modification and thus for the magnetic anomaly.
机译：研究了Pr_（0.5）Sr_（0.5）Co_（1-x）Fe_xO_（3-d）的晶体结构和磁性能，以澄清为Pr_（0.5）Sr_（0.5）CoO_（3）观察到的磁特性的起源。 -d）T_A = 120 K附近的化合物。讨论了晶体对称性，磁结构和磁异常之间的相关性。在室温下，x <0.67的化合物具有Imma空间群描述的正交晶体结构。这些化合物的晶体对称性随温度降低而降低至单斜晶（三斜晶），而x> 0.7的固溶体的晶体结构在低温下仍保持正交。 Fe百分比的增加将使化合物的磁性从铁磁性变为簇状自旋玻璃，再到自旋玻璃再变为反铁磁性。磁性特征的存在在很大程度上取决于化合物的磁性状态。所获得的数据表明，稀土亚晶格中键长的重排负责晶体结构的改变，从而引起磁异常。

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