MAGNETIC AND MAGNETORESTRICTIVE PROPERTIES OF SM1-XDYXFE2 COMPOUNDS AND ITS MOSSBAUER-EFFECT STUDIES

Citation
Hq. Guo et al., MAGNETIC AND MAGNETORESTRICTIVE PROPERTIES OF SM1-XDYXFE2 COMPOUNDS AND ITS MOSSBAUER-EFFECT STUDIES, Journal of applied physics, 75(11), 1994, pp. 7429-7432
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00218979
Volume
75
Issue
11
Year of publication
1994
Pages
7429 - 7432
Database
ISI
SICI code
0021-8979(1994)75:11<7429:MAMPOS>2.0.ZU;2-Q
Abstract
Measurements of x-ray diffraction, magnetization, magnetostriction, an d Mossbauer effect were performed on a series of Sm1-xDyxFe2 samples ( x=0, 0.1, 0.15, 0.25, 0.45, and 0.65). It is shown that the system ret ains the cubic MgCu2 struCtUre over the whole range and the lattice co nstant decreases linearly with increasing x. Results of Mossbauer effe ct study at room temperature show that for a small amount of Dy substi tution for Sm, x<0.15, easy axes of the magnetization keep in the [111 ] direction. For x>0.15, the direction of easy axes rotates gradually from [111] for x=0, and 0.1 to [100] for x=0.45 and 0.65. The concentr ation dependence of the saturation magnetization exhibits a minimum at x=0.30 for 1.5 K and at x=0.45 for room temperature, reflecting the o ccurrence of the compensation of magnetic moments at various Sm/Dy rat ios. For x=0.45 and 0.65, the pinning phenomenon of narrow domain wall s was observed at low temperature. The magnetostriction was found to d ecrease with the increase in the Dy content, as a result of the compen sation of lambda111 in Sm1-xDyxFe2.