NMR Studies of VO_2 and V_<1-x>W_XO_2
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概要
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An extensive study of the "V NMR in VO. has been made between 4.2 K and600 K, particularly laying stress on the analysis of the temperature dependenceof the nuclear relaxation rate I/7'.. In the metallic (M) phase (I>7'.=340K)an exchange-enhanced Korringa relaxation process for 1/T. is observed and thespin fluctuation effects have beeut treated within RPA. In the insulating (I) phase(T< T.), I /T.(T) cannot be explained from a simple band model and itis proposedthat the hopping motion of the self-trapped carriers or excitons are responsiblefor the relaxation process. The "V NMR in the substitutional compounds,V. ,W,0. (0<.X'<0.075), has also been studied in the M phase in order to obtainfurther knowledge to the M-I transition. From the R,PA analysis, it is shown thatthe ,v-dependence of the experimental data are in general accord with the nestingmodel proposed by M. Gupta et at.
- 社団法人日本物理学会の論文
- 1983-11-15
著者
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YASUOKA Hiroshi
Institute for Solid State Physics,University of Tokyo
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KOSUGE Koji
Department of Chemistry, Faculty of Science, Kyoto University
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TAKANASHI Koki
Institute for Materials Research (IMR), Tohoku University
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Takanashi Koki
Institute For Materials Research (imr) Tohoku University
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UEDA Yutaka
Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine
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Ueda Yutaka
Issp University Of Tokyo
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Kosuge Koji
Department Of Chemistry Faculty Of Science
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Yasuoka Hiroshi
Institute For Chemistry Research Kyoto University
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Takanashi Koki
Institute For Solid State Physics University Of Tokyo
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Ueda Yutaka
Department Of Anesthesiology Osaka Dental University
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Yasuoka Hiroshi
Institute Fo Solid State Physics University Of Tokyo
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Takanashi Koki
Institute for Material Research, Tohoku University
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