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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Effect of Mn substitution on crystal structure and magnetic properties of Bi _(1-x)Pr _xFeO _3 multiferroics
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Effect of Mn substitution on crystal structure and magnetic properties of Bi _(1-x)Pr _xFeO _3 multiferroics

机译:Mn取代对Bi _(1-x)Pr _xFeO _3多铁化合物晶体结构和磁性能的影响

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摘要

Mn substitution-driven structural and magnetic phase evolution in the predominantly antiferromagnetic polar rhombohedral (space group R3c) and weak ferromagnetic antipolar orthorhombic (space group Pnam) phases of the Bi _(1-x)Pr _xFeO _3 perovskites was studied by x-ray diffraction, ~(57)Fe M?ssbauer spectroscopy and magnetometry techniques at room temperature. Mn doping was found to effectively modify both the initial structures to stabilize a new phase demonstrating incommensurable modulation. Magnetic behaviour of the Mn-containing samples changes in correlation with the evolution of their structural state. Within the compositional range of the rhombohedrally distorted compounds, the manganese substitution gives rise to suppression of the dominant antiferromagnetic interaction. In the weak ferromagnetic doping-induced phase, a gradual decrease in room temperature spontaneous magnetization takes place with increasing Mn content.
机译:通过X射线研究了Bi _(1-x)Pr _xFeO _3钙钛矿中主要由反铁磁极性菱形(空间群R3c)和弱铁磁反极性斜方晶(空间群Pnam)相中Mn取代驱动的结构和磁相演化室温下的衍射,〜(57)Fe M?ssbauer光谱学和磁力测定技术。发现锰掺杂有效地修饰了两个初始结构以稳定新相,从而证明了无与伦比的调制。含锰样品的磁行为随其结构状态的变化而变化。在菱形扭曲的化合物的组成范围内,锰取代引起对主要反铁磁相互作用的抑制。在弱铁磁掺杂诱导相中,随着Mn含量的增加,室温下自发磁化逐渐降低。

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