Change of Magnetism in the Two-Dimensional Heisenberg Ferromagnet K_2CuF_4 Observed at High Pressures
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概要
- 論文の詳細を見る
The naechanistn responsible for determining the exchange interaction to be ferrouaaagnetic orantiferrornagnetic in Ctu" compounds is closely correlated xvith the antiferrodistortive (AFD)or ferrodistortive (FD) order of Cu" hole orbitals. One of the representative two-dimensionalHeisenberg ferromagnets, KzCuF,j, has an ideal AFD orbital ordering. To investigate the possibility of the magnetic phase transition due to a change in the orbital ordering f'rom AFD to FDat high pressures, susceptibility meastrrements of this counpovxnd have been made vtnder variouspressures up to 13 GPa over the ternperattrre range from 1.5 to 18 K. A sudden decrease in theCurie temperature starting from 7 GPa was observed. Furtherrnore, a large decrease in the sus-ceptibility was observed at presstrres above 10 GPa. These resvtlts indicate a pressure indtrcedferrornagnetic to antiferromagnetic phase transition occurring at abotrt 8 -9 GPa as a restrlt of achange of orbital state from AFD to FD order.
- 社団法人日本物理学会の論文
- 1996-07-15
著者
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ENDO Shoichi
Research Center for Materials Science at Extreme Conditions, Osaka University
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YAMADA Isao
Department of Physics, Faculty of Science, Chiba University
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Amaya Kiichi
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Amaya Kiichi
Department Of Physical Science Graduate School Of Engineering Science Osaka University : Crest Japan
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Amaya K
Department Of Physical Science Grasuate School Of Engineering Science Osaka University
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Yamada Ichihiro
National Institute For Fusion Science
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Endo S
Research Center For Materials Science At Extreme Conditions Osaka University
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Endo Shoichi
High Pressure Reseach Laboratory Faculty Of Engineering Science Osaka University
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Yamada Isao
Department Of Communications And Integrated Systems Tokyo Institute Of Technology
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ISHIZUKA Mamoru
Department of Material Physics,Faculty of Engineering Science,Osaka University
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Amaya Kiichi
Department Of Material Physics Faculty Of Engineering Scinece Osaka University
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Ishizuka Mamoru
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Endo Shoichi
Research Center For Extrem Materials Osaka University
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Amaya Kiichi
Department Of Material Physics Faculty Of Engineering Science
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Yamada Isao
Departmen Of Communications And Integrated Systems Tokyo Institute Of Technology
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Amaya Kiichi
Department of Physical Science, Grasuate School of Engineering Science, Osaka University
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