Magnetic Behavior and Magnetic Phase Diagram of Co/Mn dichloride monohydrate
Abstract
The pure components of this mixed magnetic system were studied previously.(G.C. DeFotis, G.A. Coffey, C.C. Cinquina, S. Chandarlapaty, W.W. Brubaker, D.J. Krovich, R.V. Chamberlain and W.R.A. Jarvis, Phys. Rev. B51, 15113 (1995).) The Mn system is a quasi-one-dimensional Heisenberg antiferromagnet ordering at 2.17 K due to weak interchain exchange. The Co system is an antiferromagnetic spin glass, with an antiferromagnetic transition at 15.0 K and a spin glass transition at 8.4 K. Mixtures studied here span the entire composition range. Antiferromagnetic behavior is observed, with Co rich mixtures also showing spin glass properties. The Weiss theta from fits to high temperature susceptibilities shows an unusual composition dependence. Particularly noteworthy is the T-composition phase diagram: the ordering temperature decreases from both composition extremes (x = 0,1), suggesting increased frustration on mixing. *Supported by NSF-Solid State Chemistry-Grant No. DMR- 9527357 and by the Petroleum Research Fund of the ACS. abstract.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1997
- Bibcode:
- 1997APS..MAR.R1910D