Structure and magnetic properties of Sr(2)NiAO(6) (A = W, Te)

Authors
Iwanaga, D Inaguma, Y Itoh, M
Citation
D. Iwanaga et al., Structure and magnetic properties of Sr(2)NiAO(6) (A = W, Te), MATER RES B, 35(3), 2000, pp. 449-457
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS RESEARCH BULLETIN
ISSN journal
00255408 → ACNP
Volume
35
Issue
3
Year of publication
2000
Pages
449 - 457
Database
ISI
SICI code
0025-5408(200002)35:3<449:SAMPOS>2.0.ZU;2-4
Abstract
Crystal structures and magnetic properties of the B-site ordered perovskite s Sr2NiWO6 and Sr2NiTeO6 were investigated. Powder X-ray diffraction analys is revealed that Sr2NiWO6 and Sr2NiTeO6 have the tetragonal structure of I4 /m (No. 87) and the monoclinic structure of C2/m (No, 12-2), respectively. Magnetic measurement of Sr2NiWO6 and Sr2NiTeO6 revealed that antiferromagne tic transition appears at 54 and 35 K, respectively. Heat capacity measurem ent gave a different transition temperature of 28 K for Sr2NiTeO6. Analysis of the entropy of the three-dimensional antiferromagnetic transition revea led that local ordering of spins begins at higher temperatures of observed T-N, especially in Sr2NiTeO6. (C) 2000 Elsevier Science Ltd. All rights res erved.