GIGANTIC INCREASE OF AFMR FREQUENCIES INDUCED BY NONMAGNETIC IMPURITYIONS IN ORTHOFERRITES RFE(1-X)AL(X)O(3) (R=GD,TB)

Authors
MUKHIN AA TRAVKIN VD EGOYAN AE LEBEDEV SP PROKHOROV AS BALBASHOV AM PARSEGOV IY
Citation
Aa. Mukhin et al., GIGANTIC INCREASE OF AFMR FREQUENCIES INDUCED BY NONMAGNETIC IMPURITYIONS IN ORTHOFERRITES RFE(1-X)AL(X)O(3) (R=GD,TB), Journal of magnetism and magnetic materials, 158, 1996, pp. 496-498
Citations number
7
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
158
Year of publication
1996
Pages
496 - 498
Database
ISI
SICI code
0304-8853(1996)158:<496:GIOAFI>2.0.ZU;2-8
Abstract
We observed a 'gigantic' increase (up to three times) of the AFMR freq uencies nu(1,2) with decreasing temperature in GdFe0.9Al0.1O3 and TbFe 0.925Al0.075O3 in contrast to pure GdFeO3 and TbFeO3. The effects obse rved are explained by the appearance of an additional exchange field H (mv)approximate to=20-36 kOe on rare-earth ions due to decompensation of the surrounding antiferromagnetically ordered Fe ions near nonmagne tic impurity ions.