Effects of Randomness on Field-Induced Phase Transition in the Bond-Alternating S=1 Spin Chain NTENP(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
- 論文の詳細を見る
We report novel effects of randomness in [Ni(N, N'-bis(3-aminopropyl)propane-1, 3-diamine(μ-NO_2)]ClO_4 (NTENP), an S=1 bond-alternating linear antiferromagnet with a dimer-singlet ground state. ^<15>N NMR spectra develop a continuum with sharply peaked edges at low temperatures, indicating a field-induced inhomogeneous staggered magnetization. We attribute this to random anisotropic interactions due to the disorder of NO_2 groups. The field-induced antiferromagnetic transition exhibits a markedly anisotropic behavior. We propose that the incoherent magnetization below the critical field (H_c) is transformed into a coherent antiferromagnetic moment with a spatially fluctuating amplitude above H_c.
- 社団法人日本物理学会の論文
- 2005-09-15
著者
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TAKIGAWA Masashi
Institute for Solid State Physics, University of Tokyo
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HAGIWARA Masayuki
KYOKUGEN, Osaka University
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Kodama Katsuaki
Institute For Solid State Physics The University Of Tokyo
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Kodama Katsuaki
Institute For Solid State Physics University Of Tokyo:(present Address) Neutron Science Research Cen
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Hagiwara Masayuki
Center For Quantum Science And Technology Under Extreme Conditions Osaka University
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Takigawa Masashi
Institute For Solid State Physics Iniversity Of Tokyo
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MATSUBARA Shinichi
Institute for Solid State Physics, University of Tokyo
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Hagiwara Masayuki
Kyokugen Osaka University
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Matsubara Shinichi
Institute For Solid State Physics University Of Tokyo
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Hagiwara Masayuki
Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University
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KODAMA Katsuaki
Institute for Solid State Physics, University of Tokyo:(Present address) Neutron Science Research Center, JAERI
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