Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 50, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1143/JJAP.50.101102
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Funding
- National Basic Research Program of China [2009CB939901]
- National Nature Science Foundation of China [20821091, 20423005, 10874006]
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Solid solutions of the Gd1-xCaxVO3 system with 0.0 <= x <= 1 were prepared by solid state reactions, and a comprehensive study on their transport and magnetic properties was conducted. This system exhibits a composition-induced metal-insulator transition at x = 0.5-0.6 and an antiferromagnetic-to-paramagnetic transition at x = 0.1-0.2. The metal-insulator transition is mainly attributed to the filling-controlled mechanism. For the samples in the insulator range 0.0 <= x <= 0.5, the transport is subject to the variable range hopping mechanism at low temperatures and the thermally activated mechanism at high temperatures. For the samples in the metal range 0.6 <= x <= 1.0 with itinerant electrons, the magnetic properties show Curie-Weiss dependence rather than Pauli behavior. Pauli paramagnetic properties were observed only for CaVO3 (x =1.0). (C) 2011 The Japan Society of Applied Physics
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