Field-Induced Magnetic Long-Range Order in the Ferromagnetic-Antiferromagnetic Alternating Heisenberg Chain System (CH_3)_2CHNH_3CuCl_3 Observed by Specific Heat Measurements
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概要
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The compotrnd (CH3)2CHNH3CLlCl3 has recently been f'ound to be an ideal ferrornagneticantiferrottuagnetic alternating Heisenberg chain with the energy gap Ark : 17 x l8K [H.Nlanakx et at.: J. Phys. Soc. Jpn. 66 (1997) 564]. When aua external field H is applied tothis conapotund, the energy gap shotrld vanish at the critical field H.) : A/gp,3. Jtrst above H.?,the three-dimensional magnetic long-range order is expected, if' the interchain cotrpling exists.Motivated by this expectation, we perf'ormed specific heat rneasureraaents over a temperattrrerange from 0.5 to 5 K applying H up to 12 T. As a result, we found a A-type anomaly of specificheat over 10 x 12 T which indicates a transition to the three-dimensional long range order. Theternperature at which the A-type anonaaly appears increases with increasing H . The critical fieldobtained by extrapolating the cttrve of the A peak position versus H is 9.0 T, which is close tothat obtained from a rnagnetization naeasuretnent.
- 社団法人日本物理学会の論文
- 1998-11-15
著者
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KATSUMATA Koichi
The Institute of Physical and Chemical Research (RIKEN)
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MANAKA Hirotaka
Department of Physics, Faculty of Science, Chiba University
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YAMADA Isao
Department of Physics, Faculty of Science, Chiba University
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Yamada Isao
Department Of Communications And Integrated Systems Tokyo Institute Of Technology
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HONDA Zentaro
The Institute of Physical and Chemical Research (RIKEN)
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ARUGA KATORI
Department of Physics,Faculty of Science,Chiba University
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Manaka Hirotaka
Department Of Cardiology The Heart Institute Of Japan Tokyo Women's Medical University
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Manaka Hirotaka
Department Of Physics Faculty Of Science Chiba University
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Aruga Katori
Department Of Physics Faculty Of Science Chiba University
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Honda Z
The Institute Of Physical And Chemical Research (riken)
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Katsumata Koichi
The Institute Of Physical And Chemical Research
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Yamada Isao
Departmen Of Communications And Integrated Systems Tokyo Institute Of Technology
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