Abstract
Magnetic measurements have been performed to investigate nonmagnetic impurity effects on a Zn-doped ladder system (Cui1-ϰZnϰ)2(C5H12N2)2Cl4. The paramagnetic contribution in the susceptibility ϰˊ of the Zn-doped system increases with increasing ϰ below the gap temperature. The susceptibility obeys the Curie law in the temperature range between 0.5 K and 2 K. However, at temperatures below 0.5 K. ϰˊT drops with decreasing temperature, which suggests the crossover in the Curie constant as predicted by Sigrist and Furusaki [J. Phys. Soc. Jpn. 65 (1996) 2385]. Magnetization curves of the Zn-doped system are compared with that of the pure system. The impurity-induced spin behaves like a paramagnetic S= 1/2 spin and the spin-gap state survives even in the Zn-doped system with the content ϰ up to 0.117. These results seem to originate from the weak interladder interaction of the system.
Original language | English |
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Pages (from-to) | 3707-3710 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 67 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1998 Jan 1 |
Externally published | Yes |
Keywords
- Cu(CHN)Cl
- impurity effect
- spin gap
- spin ladder
ASJC Scopus subject areas
- Physics and Astronomy(all)