广西师范大学学报（自然科学版） ›› 2012, Vol. 30 ›› Issue (3): 201-206.

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“分子合金”类普鲁士蓝配合物Co0.25Mn1.25[Fe(CN)6]·5.9H2O的磁性研究

何云1, 林卿1,2, 张辉1, 雷成龙1, 黄海富1, 梁福沛3   

  1. 1.广西师范大学物理科学与技术学院,广西桂林541004;
    2.海南医学院信息技术部,海南海口571101;
    3.广西师范大学化学化工学院,广西桂林541004
  • 收稿日期:2012-05-15 出版日期:2012-09-20 发布日期:2018-12-04
  • 通讯作者: 何云(1962—),男,广西灌阳人,广西师范大学教授,博士。E-mail:hy@gxnu.edu.cn
  • 作者简介:何云,男,汉族,1962年8月生,广西灌阳人,博士,教授。
  • 基金资助:
    国家自然科学基金资助项目(11164002,20971029);广西自然科学基金资助项目(0991092)

Magnetic Properties of “Molecular Alloys” Prussisa Blue Co0.25Mn1.25[Fe(CN)6]·5.9H2O

HE Yun1, LIN Qing1,2, ZHANG Hui1, LEI Cheng-long1, HUANG Hai-fu1, LIANG Fu-pei3   

  1. 1.College of Physics and Technology,Guangxi Normal University,Guilin Guangxi 541004,China;
    2.Department of Information Technology,Hainan Medical College,Haikou Hainan 571101,China;
    3.College of Chemistry and Chemical Engineering,Guangxi Normal University,Guilin Guangxi 541004,China
  • Received:2012-05-15 Online:2012-09-20 Published:2018-12-04

摘要： 合成了多金属普鲁士蓝类配合物Co0.25Mn1.25[Fe(CN)6]·5.9H2O并测定其磁学性质。变温磁化率研究表明:化合物存在亚铁磁性交换相互作用,磁相变温度Tc是9.5 K;由场冷却(FC)磁化强度和零场冷却(ZFC)磁化强度曲线和交流磁化曲线上磁化率证实化合物存在自旋玻璃态行为。观测到化合物的矫顽场Hc是230 Oe,剩余磁化强度Mr是0.072 μβ。样品的室温穆斯堡尔谱中出现一个双峰,它的同质异能移(IS)为-0.15(4) mm/s,四极分裂(QS)为0.41(9) mm/s,这一参数说明配合物Co0.25Mn1.25[Fe(CN)6]·5.9H2O中有低自旋的三价铁离子存在。同时该化合物存在磁有序与自旋玻璃态行为。

关键词: 普鲁士蓝类化合物, 分子合金磁体, 亚铁磁性, 自旋玻璃态, 穆斯堡尔谱

Abstract: A multi-metal Prussisa blue compound Co0.25Mn1.25[Fe(CN)6]·5.9H2O has been synthesized.The magnetic property of the compound was measured.The temperature-dependent magnetic susceptibilities indicate that there exists a ferrimagnetic exchange interaction in the compound,and magnet transition at 9.5 K.It has been confirmed that there exists a spin-glass behave in the compound through Zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves,and AC magnetization curves.The observed value of coercive field (Hc) and remanent magnetization(Mr) for the compound are 230 Oe and 0.072 μβ.Room temperature Mossbauer spectrum reveals a doublet with the isomer shift parameter (-0.15(4) mm/s) and quadrupole splitting (QS=0.41(9) mm/s) characteristic for low-spin Fe(Ⅲ) ions incompounds Co0.25Mn1.25[Fe(CN)6]·5.9H2O.Inaddition,there exists a spin-glass behaviour in the compound.

Key words: Prussian blue analogue, molecular alloys magnet, ferrimagnetism, spin-glass state, MÖssbauer

中图分类号: 

  • O482.5
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