QUASI ONE-DIMENSIONAL SPIN SYSTEM IN LANGMUIR-BLODGETT-FILMS OF A CHARGE-TRANSFER COMPLEX

被引:11
作者
IKEGAMI, K [1 ]
KURODA, S [1 ]
SUGI, M [1 ]
NAKAMURA, T [1 ]
TACHIBANA, H [1 ]
MATSUMOTO, M [1 ]
KAWABATA, Y [1 ]
机构
[1] NATL CHEM LAB IND,TSUKUBA,IBARAKI 305,JAPAN
关键词
ESR; ONE-DIMENSIONAL SPIN SYSTEM; EXCHANGE NARROWING; INTERCHAIN COUPLING; CHARGE-TRANSFER COMPLEX; LB FILMS; MOLECULAR ORIENTATION;
D O I
10.1143/JPSJ.61.3752
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The ESR spectra of conductive Langmuir-Blodgett (LB) films of N-docosylpyridinium-(TCNQ)2 are observed at the X and K bands. The spectrum simulation method is adopted to analyze these spectra, which show clear out-of-plane anisotropy, in order to obtain information concerning the magnetic and structural properties of the system. The analysis reveals that the linewidth anisotropy is dominated by the exchange-narrowed secular dipolar width peculiar to quasi one-dimensional spin systems. This result is consistent with the temperature dependent spin susceptibility data of the system, which has been found to be explained by the random-exchange Heisenberg antiferromagnetic chain model. These facts indicate the development of one-dimensional spin chains in the LB films. In addition, the orientation of TCNQ molecule is estimated from the spectrum analysis.
引用
收藏
页码:3752 / 3765
页数:14
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