A Novel Ordered Phase in SrCu_2(BO_3)_2 under High Pressure(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We report results of ^<11>B NMR and susceptibility measurements on the quasi two-dimensional frustrated dimer spin system SrCu_2(BO_3)_2 under high pressure. At 2.4 GPa and in a magnetic field of 7T, NMR lines split with decreasing temperature in two steps. A gradual splitting below T=30K breaking the four-fold symmetry of magnetic response is followed by a further sudden splitting below 3.6K. The latter indicates a magnetic phase transition, which is also marked by a kink in the susceptibility at 1.44GPa. From the magnetic hyperfine shift data, we conclude that the low-T phase has a doubled unit cell containing two types of dimers, one in a nearly singlet state and the other with a finite magnetization down to T=0.
- 社団法人日本物理学会の論文
- 2007-07-15
著者
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KAGEYAMA Hiroshi
Department of Chemistry, Graduate School of Science, Kyoto University
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UEDA Yutaka
Institute for Solid State Physics, University of Tokyo
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陰山 洋
Department Of Chemistry Graduate School Of Science Kyoto University
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TAKIGAWA Masashi
Institute for Solid State Physics, University of Tokyo
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Ueda Yutaka
Institute For Solid State Physics University Of Tokyo
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UWATOKO Yoshiya
Institute for Solid State Physics, The University of Tokyo
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Kageyama Hiroshi
Department Of Applied Chemistry Faculty Of Engineering Osaka University
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Ueda Yutaka
The Institute For Solid State Physics The University Of Tokyo
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Takigawa Masashi
Institute For Solid State Physics The University Of Tokyo
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Ueda Yutaka
Issp University Of Tokyo
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WAKI Takeshi
Institute for Solid State Physics, The University of Tokyo
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ARAI Koichi
Institute for Solid State Physics, The University of Tokyo
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SAIGA Yuta
Institute for Solid State Physics, The University of Tokyo
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SAIGA Yuta
Graduate School of Science and Engineering, Saitama University
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Uwatoko Yoshiya
Institute For Solid State Physics The University Of Tokyo
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Takigawa Masashi
Institute For Solid State Physics Iniversity Of Tokyo
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Saiga Yuta
Graduate School Of Science And Engineering Saitama University
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Saiga Yuta
Institute For Solid State Physics The University Of Tokyo:graduate School Of Science And Engineering
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Waki Takeshi
Institute For Solid State Physics The University Of Tokyo
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Arai Koichi
Institute For Solid State Physics The University Of Tokyo:(present Office)hitachi Medical Corporatio
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Uwatoko Yoshiya
Institute For Solid State Physics (issp) The University Of Tokyo
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Ueda Yutaka
Institute For Solid State Physic The University Of Tokyo
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Saiga Yuta
Institute for Advanced Materials Research, Hiroshima University, Higashihiroshima, Hiroshima 739-8530
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Uwatoko Yoshiya
Institute for Solid State Physics
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