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Magnetic and Moessbauer Studies in Molecular-based magnets NBu_4M_A~ⅡFe~Ⅲ(OX)_3 (M_A=Co, Fe)

机译:分子磁体NBu_4M_A〜ⅡFe〜Ⅲ(OX)_3(M_A = Co,Fe)的磁性和Moessbauer研究

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摘要

The mixed valency character and antiferromagnetic coupling in molecule magnets materials NBu_4M_A~Ⅱ[Fe~Ⅲ(OX)_3] (M_A=Co, Fe) were investigated by magnetic measurements and Mossbauer spectroscopy .In the sample NBu_4M_A~Ⅱ[Fe~Ⅲ(OX)_3],the appearence of temperature point of spin-glass phase transition and magnetic phase transition under the zero-field-cooled AC magnetic measurements with the temperature range 5-100 K.The sample NBu_4M_A~Ⅱ[Fe~Ⅲ(OX)_3] were carried out in the cooling modes in a field,and the sample exhibits multiple magnetic pole reversals in the wanning mode magnetic measurements.The phenomenon of multiple magnetic pole reversals occurs in some of those ferrimagnetic materials consisting of magnetic anisotropy ions and two or more types of antiferromagnetically ordered magnetic ions.The compound NBu_4M_A~Ⅱ[Fe~Ⅲ(OX)_3] contains two different spin carries; ie: Fe(Ⅱ) (S_(Fe(Ⅱ)) = 2), Fe(Ⅲ) (S_(Fe(Ⅲ)) = 5/2) comes from the Mossbauer studies.
机译:通过磁测量和Mossbauer光谱研究了分子磁体材料NBu_4M_A〜Ⅱ[Fe〜Ⅲ(OX)_3](M_A = Co,Fe)的混合价特性和反铁磁耦合。样品NBu_4M_A〜Ⅱ[Fe〜Ⅲ( OX)_3],在温度范围为5-100 K的零磁场冷却交流磁测量下,自旋玻璃相变和磁性相变的温度点出现。样品NBu_4M_A〜Ⅱ[Fe〜Ⅲ(OX )_3]在一个冷却模式下进行,一个样品在减弱模式的磁测量中显示出多个磁极反转。在一些由磁各向异性离子和两个亚铁磁材料组成的亚铁磁性材料中,出现了多个磁极反转现象。化合物NBu_4M_A〜Ⅱ[Fe〜Ⅲ(OX)_3]包含两个不同的自旋载流子;或更多类型的反铁磁有序磁离子。即:Fe(Ⅱ)(S_(Fe(Ⅱ))= 2),Fe(Ⅲ)(S_(Fe(Ⅲ))= 5/2)来自Mossbauer研究。

著录项

  • 来源
    《Progress in functional materials》|2012年|215-218|共4页
  • 会议地点 Shanghai(CN)
  • 作者单位

    College of Physics and Technology, Guangxi Normal University, Guilin 541004, China,Department of Information Technology, Hainan Medical College, Haikou 571101, China;

    College of Physics and Technology, Guangxi Normal University, Guilin 541004, China;

    College of Physics and Technology, Guangxi Normal University, Guilin 541004, China;

    College of Physics and Technology, Guangxi Normal University, Guilin 541004, China;

    College of Physics and Technology, Guangxi Normal University, Guilin 541004, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Magnetism; Mixed valency; Molecular-based magnet; Compensation temperature;

    机译:磁;混合价;分子基磁铁;补偿温度;

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