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Route to high Neel temperatures in 4d and 5d transition metal oxides

Middey, S and Nandy, Ashis Kumar and Pandey, SK and Mahadevan, Priya and Sarma, DD (2012) Route to high Neel temperatures in 4d and 5d transition metal oxides. In: PHYSICAL REVIEW B, 86 (10).

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Official URL: http://dx.doi.org/10.1103/PhysRevB.86.104406


There are very few magnetic members among the 4d and 5d transition metal oxides. In the present work, we examine the recent observation of a high Neel temperature T-N in the 4d oxides SrTcO3 and CaTcO3. Considering a multiband Hubbard model, we find that T-N is larger in the limit of a large bandwidth and vanishingly small intra-atomic exchange interaction strength, contrary to our conventional understanding of magnetism. This is traced to specific aspects of the d(3) configuration at the transition metal site and the study reveals additional examples with high T-N.

Item Type: Journal Article
Publisher: American Physical Society
Additional Information: Copyright for this article belongs to the American Physical Society
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 18 Dec 2012 09:59
Last Modified: 18 Dec 2012 09:59
URI: http://eprints.iisc.ac.in/id/eprint/45162

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