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Anisotropic Magnetic Properties and Anomalous Thermal Conductivity in the bc Plane of the Quasi-Two-Dimensional Spin System Cu3B2O6: Relation between the Thermal Conductivity and the Spin State in Magnetic Fields.
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- Kudo Kazutaka
- Department of Applied Physics, Graduate School of Engineering, Tohoku University
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- Noji Takashi
- Department of Applied Physics, Graduate School of Engineering, Tohoku University
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- Koike Yoji
- Department of Applied Physics, Graduate School of Engineering, Tohoku University
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- Sakon Takuo
- Department of Mechanical Engineering, Faculty of Engineering and Resource Science, Akita University
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- Motokawa Mitsuhiro
- Institute for Materials Research, Tohoku University
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- Nishizaki Terukazu
- Institute for Materials Research, Tohoku University
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- Kobayashi Norio
- Institute for Materials Research, Tohoku University
Bibliographic Information
- Other Title
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- Anisotropic Magnetic Properties and Anomalous Thermal Conductivity in the<i>b</i><i>c</i>Plane of the Quasi-Two-Dimensional Spin System Cu<sub>3</sub>B<sub>2</sub>O<sub>6</sub>: Relation between the Thermal Conductivity and the Spin State in Magnetic Fields
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Description
We have measured the magnetic susceptibility in a magnetic field of 1 T (rotating the field direction) in the bc plane, the magnetization curve in magnetic fields up to 30 T and the thermal conductivity in magnetic fields up to 14 T for the quasi-two-dimensional spin system Cu3B2O6. Two-fold symmetry of the susceptibility in the bc plane has been found to develop at low temperatures below the Néel temperature TN=10 K. This is understood on the basis of the low symmetry of the Cu–O–Cu network. The susceptibility does not appear to vanish as T→0 K even in the direction where the magnetization exhibits the minimum, indicating that the spin arrangement in the bc plane at T<TN is noncollinear. The magnetization curve exhibits a bend and/or a jump associated with either spin–flop or metamagnetic transition at T<TN, depending on the field direction. The thermal conductivity along the direction where the magnetization exhibits the minimum in the bc plane has been found to exhibit marked enhancement and a peak at T<TN, which is understood to be caused by the increase of the thermal conductivity due to magnons. The peak is suppressed with increasing magnetic-field below 12 T and tends to recover in high field above 12 T. It has been found that the thermal conductivity strongly correlates with the spin state in Cu3B2O6.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 72 (3), 569-575, 2003
THE PHYSICAL SOCIETY OF JAPAN
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Keywords
Details 詳細情報について
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- CRID
- 1390282679159402240
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- NII Article ID
- 110001974261
- 210000104676
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- NII Book ID
- AA00704814
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- BIBCODE
- 2003JPSJ...72..569K
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 6479540
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
- OpenAIRE
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- Abstract License Flag
- Disallowed