Antiferromagnetic order in an ferromagnetic-antiferromagnetic random alternating quantum spin chain: (CH3)2CHNH 3Cu(Clx Br1-x)3

Tota Nakamura

doi:10.1143/JPSJ.72.789

Antiferromagnetic order in an ferromagnetic-antiferromagnetic random alternating quantum spin chain: (CH₃)₂CHNH ₃Cu(Cl_x Br_1-x)₃

Tota Nakamura

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

A possibility of the uniform antiferromagnetic order is pointed out in an S = 1/2 ferromagnetic-antiferromagnetic (F-AF) random alternating Heisenberg quantum spin chain compound: (CH₃)₂CHNH ₃Cu(Cl_x Br_1-x)3. The system exhibits bond alternation of strong random bonds that take ±2J and weak uniform AF bonds of -J. In pure concentration limits, the model reduces to the AF-AF alternation chain at x = 0 and to the F-AF alternation chain at x = 1. By using the nonequilibrium relaxation method of quantum Monte Carlo simulations, it is found that the uniform AF order exhibits critical behaviors in the intermediate concentration region. This explains the experimental observation of the magnetic phase transition. The present results suggest that the uniform AF order survives even in the presence of randomly located ferromagnetic bonds.

Original language	English
Pages (from-to)	789-792
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	72
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.72.789
Publication status	Published - 2003 Apr 1

Keywords

Impurity-induced magnetic order
Nonequilibrium relaxation method
Random quantum spin chain

ASJC Scopus subject areas

Physics and Astronomy(all)

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Nakamura, T. (2003). Antiferromagnetic order in an ferromagnetic-antiferromagnetic random alternating quantum spin chain: (CH₃)₂CHNH ₃Cu(Cl_x Br_1-x)₃. Journal of the Physical Society of Japan, 72(4), 789-792. https://doi.org/10.1143/JPSJ.72.789

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