Chin. Phys. Lett.  1995, Vol. 12 Issue (5): 313-316    DOI:
Original Articles |
Far Infrared Resonance Transition Study of the Chain-End S = 1/2 Modes in an S = 1 Antiferromagnetic Chain
LU Wei1,2;SHEN Xuechu1;LIU Pulin1;M. von Ortenberg3;J . Tuchendler4;J . P. Renard5;ZHENG Fen6
1National Laboratory for Infrared Physics, Academia Sinica, Shanghai Institute of Technical Physics, Academia Sinica, Shanghai 200083 2Fudan-T. D. Lee Physics Laboratory, Department of Physics, Fudan University, Shanghai 200433 3Humboldt University of Berlin, Invalidenstraβe 110, 0-1040 Berlin, F. R. Germany 4Lahoratoire de Dispositiofs Infrarouge et Micro-Ondes, Université Paris VI, F-75252 Paris, France 5Institut d’Electronique Fondamentale, Université Paris-Sud, F-91405 Orsay, France 6Department of Biology, Shanghai Normal University, Shanghai 200234
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LU Wei, SHEN Xuechu, LIU Pulin et al  1995 Chin. Phys. Lett. 12 313-316
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Abstract The unpaired spin S = 1/2 states which occur at the ends of an S = 1 Heisenberg-like antiferromagnetic chain, have been observed recently in low-temperature electron spin-resonance measurements of Ni(C2H8N2)2 NO2 ClO4containing selected impurities. We present here a further study on this topic by far infrared transmission spectra under the magnetic field. The splitting of S = 1/2 modes was clearly observed and explained by the interaction of S = 1/2 modes at two nearby chains, which can be separated by vacancy-like defect.
Keywords: 75.10.Jm      75. 30. Hx      76.30.Fc     
Published: 01 May 1995
PACS:  75.10.Jm (Quantized spin models, including quantum spin frustration)  
  75. 30. Hx  
  76.30.Fc (Iron group (3d) ions and impurities (Ti-Cu))  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1995/V12/I5/0313
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LU Wei
SHEN Xuechu
LIU Pulin
M. von Ortenberg
J . Tuchendler
J . P. Renard
ZHENG Fen
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