Griffith phase-induced ferromagnetic diffuse phase transition

Griffith phase-induced ferromagnetic diffuse phase transition
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格里菲斯相诱导铁磁扩散相变

DOI:
10.1179/1432891715z.0000000001417
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发表时间:
2015-05
影响因子:
--
通讯作者:
Song X. P.
Song X. P.
中科院分区:
--
文献类型:
--
作者:
Lu R. E.;Chang K. G.;Yang S.;Yao Y. G.;Fu B.;Song X. P.

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摘要铁磁转变一般被认为是一个无扩散过程,表现出磁性随温度的急剧变化。然而,在本文中,我们报告了一个铁磁扩散相变(FDPT)诱导的格里菲斯相在La 1 − xSrxMnO 3(0·06 ≤ x ≤ 0·2)。这种FDPT经历了一个广泛的转变温度范围,导致温度控制的铁磁集团由于格里菲斯相的存在,在扩散过程中。由M-T曲线计算出FDPT样品的转变温度范围为146 K。 进一步的分析表明,这种新的FDPT具有相同的情况下,在铁电弛豫,铁电团簇嵌入顺电矩阵。
Abstract A ferromagnetic transition is generally regarded as a diffusionless process, exhibiting a sharp change of magnetic properties with temperature. In this paper, however, we report a ferromagnetic diffuse phase transition (FDPT) induced by Griffiths phase in La1 − xSrxMnO3 (0·06 ≤ x ≤ 0·2). Such a FDPT experiences a broad transition temperature range, resulting in temperature-controlled ferromagnetic cluster owing to the existence of Griffiths phase during the diffusion process. The transition temperature range calculated from M–T curve is as large as 146 K for the FDPT sample. Further analysis suggests that this novel FDPT has the same scenario with that in the ferroelectric relaxor, where the ferroelectric clusters are embedded in the paraelectric matrix.
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