Novel low-dimensional spin 1/2 antiferromagnets : two-halide exchange pathways in A2CuBr4 salts

• Published in: Journal of applied physics Vol. 69; no. 8; pp. 5804 - 5806
• Main Authors: ZHOU, P, DRUMHELLER, J. E, RUBENACKER, G. V, HALVORSON, K, WILLETT, R. D
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Woodbury, NY American Institute of Physics 15.04.1991
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Physics; Saturation moments and magnetic susceptibilities
• ISSN: 0021-8979; 1089-7550
• DOI: 10.1063/1.347883

Magnetic susceptibility studies of several A2CuBr4 salts, where A is an organoammonium cation, are reported. These salts contain tetrahedrally distorted CuBr2−4 anions. Magnetic exchange pathways exist through interanionic Br⋅⋅⋅Br pathways. In this manner, various types of new antiferromagnetic spin 1/2 magnetic systems have been obtained. As examples, a one-dimensional chain, a coupled pair of chains or ‘‘ladder,’’ a two-dimensional square lattice, and a distorted ‘‘honeycomb’’ lattice are discussed.