Phys. Rev. B 66, 092406 (2002) [4 pages]Influence of oxygen stoichiometry on the spin-glass behavior of LiCrMnO4-δ spinelsReceived 29 May 2002; revised 25 July 2002; published 25 September 2002 Magnetic properties of the geometrically frustrated spinel antiferromagnets LiCrMnO4-δ (0<~δ<~0.081) have been studied with dc and ac magnetic susceptibility and heat capacity measurements, which all give evidence of spin-glass behavior. These compounds exhibit a spin-glass transition ranging from 13 K for δ=0 to 15 K for δ=0.081. With increasing δ, peak of the magnetic heat capacity is progressively rounded and the magnetic entropy is lowered. This suggests that the number of spins participating in the spin-glass state is rather sensitive to the level of lattice defect. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.092406
DOI:
10.1103/PhysRevB.66.092406
PACS:
75.40.-s, 75.50.Lk, 64.70.Kb, 65.40.Ba
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.