High Field Phase Transitions of Quasi One-Dimensional S=1/2 Heisenberg Antiferromagnet Cu_2(1,4-diazacycloheptane)_2Cl_4 Observed by Submillimenter Wave ESR

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概要

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• Millimeter and strbmillirneter wave ESR raaeastrrenaents on a single crystal of an S : 1 /2Heisenberg ladder-like systeun CU2 (C5H12N2)2C14 have been perf'ormed using a pulsed taaagneticfield up to 16 T. The gap is estiuaaated to Ice 9.7 K frouaa the temperature dependence of ESRintensity. The detailed freqtuency dependence of ES R in the frequency region from 40 to 420 GHzat 1.8K suggests tnagnetic transitions at H.) : 7.5T, H.) : 1O.1T and H. : 13.2T. Atransition at 1O.1T is suggested for the first tiuaue. These results are disctrssed with previotrstnagnetization rneasurenaents and theoretical calctrlations, and otrr results appear to be diffictrltto interpret according to the sinaple ladder rmodel.

• 社団法人日本物理学会の論文
• 1999-03-15

著者

• Shin-ichi Kimura

  Uvsor Facility Institute For Molecular Science

• Tanaka Tsuyoshi

  Department of Earth and Environmental Sciences, Nagoya University

• OHTA Hitoshi

  Department of Physics,Faculty of Science,Kobe University

• Kimura S

  The Graduate School Of Science An Technology Kobe University

• NAGASAWA Hiroshi

  Institute of Physics,University of Tsukuba

• OKUBO Susumu

  The Graduate School of Science and Technology,Kobe University

• Okubo S

  Molecular Photoscience Research Center Kobe University:venture Business Laboratory Kobe University

• Okubo Susumu

  Institute For Materials Research Tohoku University

• KIKUCHI Hikomitsu

  Institute of Physics,University of Tsukuba

• Kimura S

  Graduate School Of Science And Technology Kobe University

• Kimura Shin-ichi

  Division Of Mathematical And Material Science Graduate School Of Science And Technology

• Ohta Hitoshi

  Department Of Physics Faculty Of Science Kobe University

• Kikuchi H

  Department Of Applied Physics Fukui University

• Kikuchi H

  Institute Of Physics University Of Tsukuba

• Kikuchi H

  Kyoto Univ. Kyoto

• Kikuchi Hikomitsu

  Institute Of Physics The University Of Tsukuba

• KIMURA Shojiro

  The Graduate School of Science an Technology,Kobe University

• Tanaka T

  Department Of Molecular Engineering Kyoto University

• Tanaka Tsuyoshi

  Department Of Bioresources Chemistry Faculty Of Agriculture Okayama University

• Kikuchi Hikomitsu

  Institute Of Physics University Of Tsukuba

• Kimura Shojiro

  The Graduate School Of Science An Technology Kobe University

• Kimura Shojiro

  Molecular Photoscience Research Center And Department Of Physics:(present Address)kyokugen Osaka Uni

• Kikuchi Hitoshi

  Atomic Energy Research Institute College Of Science And Technology Nihon University

• Nagasawa H

  Institute Of Physics University Of Tsukuba

• Okubo Susumu

  Department Of Physics And Astronomy University Of Rochester

• Nagasawa Hiroshi

  Institute For Solid State Physics The University Of Tokyo

• Tanaka Tsuyoshi

  Department Of Physics Faculty Of Science Kobe University

• OKUBO Susumu

  Venture Business Laboratory, Kobe University:Molecular Photoscience Research Center, Kobe University

• Kikuchi Hikomitsu

  Department of Applied Physics, Fukui University

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