EFFECT OF MAGNETIC VACANCIES ON DYNAMIC PROPERTIES OF ORTHOFERRITES GDF1-XALXO3 AND HOFE1-XALXO3

Authors
MUKHIN AA TRAVKIN VD EGOYAN AE LEBEDEV SP PROKHOROV AS BALBASHOV AM PARSEGOV IY
Citation
Aa. Mukhin et al., EFFECT OF MAGNETIC VACANCIES ON DYNAMIC PROPERTIES OF ORTHOFERRITES GDF1-XALXO3 AND HOFE1-XALXO3, Journal of magnetism and magnetic materials, 140, 1995, pp. 2161-2162
Citations number
6
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
140
Year of publication
1995
Part
3
Pages
2161 - 2162
Database
ISI
SICI code
0304-8853(1995)140:<2161:EOMVOD>2.0.ZU;2-Z
Abstract
We have revealed a strong influence of non-magnetic impurity Al3+ ions (magnetic vacancies) on spin excitations in GdFe0.9Al0.1O3 and HoFe0. 925Al0.075O3 at frequencies upsilon = 2-33 cm(-1). A significant growt h of the frequencies of both AFMR modes upsilon(1) and upsilon(2) at l ow temperatures was found in GdFe0.9Al0.1O3 as against the pure GdFeO3 . The anomalies observed in the behaviour of AFMR modes for HoFe0.925A l0.075O3 at T-M = 60 K make evidence for a new first-order spin reorie ntational phase transition from Gamma(4)(G(x)F(z)) phase to antiferrom agnetic phase Gamma(1)(G(y)) induced by the magnetic vacancies.