Giant magnetoimpedance near a metal-insulator transition: Study of Fe in aV2O3 matrix

Authors
Kale, S Lofland, SE Bhagat, SM Sebastian, L Ramesha, K Gopalakrishnan, J Ogale, SB Li, YH Garrison, J
Citation
S. Kale et al., Giant magnetoimpedance near a metal-insulator transition: Study of Fe in aV2O3 matrix, APPL PHYS L, 77(17), 2000, pp. 2725-2727
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
77
Issue
17
Year of publication
2000
Pages
2725 - 2727
Database
ISI
SICI code
0003-6951(20001023)77:17<2725:GMNAMT>2.0.ZU;2-C
Abstract
We report microwave absorption measurements as a function of temperature (f rom 290 to 125 K) and magnetic field (from 0 to 0.3 T) in mm-thick parallel epipeds of sintered V2O3 and V2O3 containing micron-size Fe precipitates. A s before, it turns out that near the metal-insulator (MI) transition, the l oss exhibits a sharp peak as a function of temperature. On application of a magnetic field, the peak temperature for (V2O3+Fe) changes by a few kelvin , causing a giant magnetoimpedance (approximate to 200% in 0.1 T field) in the neighborhood of the MI transition. (C) 2000 American Institute of Physi cs. [S0003-6951(00)01443-1].