Design of a Random Quantum Spin Chain Paramagnet: Sr 3 CuPt 0.5 Ir 0.5 O 6
Authors:
- 26 January 1996
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 271 (5248) , 489-491
Abstract
A new class of magnetic behavior, random quantum spin chain paramagnetism, has been observed in the one-dimensional compound Sr 3 CuPt 1- x Ir x O 6 . A random quantum spin chain system has S = ½ spins coupled by Heisenberg exchange interactions that are randomly ferromagnetic or antiferromagnetic between neighbors along the chain. This condition was fulfilled by members of the solid solution Sr 3 CuPt 1- x Ir x O 6 ( x = 0, 0.25, 0.50, 0.75, and 1), whose end-members, Sr 3 CuPtO 6 and Sr 3 CuIrO 6 , are antiferromagnetic and ferromagnetic, respectively. Magnetic susceptibility data for the solid solution Sr 3 CuPt 1- x Ir x O 6 ( x = 0, 0.25, 0.50, 0.75, and 1) were collected and were found to be in excellent agreement with a theoretical model.Keywords
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