J. Phys. IV France 07 (1997) C1-347-C1-348
FMR and Static Magnetic Properties of Gallium Substituted MagnetoplumbiteM. Marysko1, Z. Frait2 and S. Krupicka1
1 Institute of Physics AS CR, Cukrovarnicka 10, 162 00 Praha 6, Czech Republic
2 Institute of Physics AS CR, Na Slovance 2, 180 40 Praha 8, Czech Republic
Magnetization and uniaxial anisotropy were studied on single crystals of PbFe12-xGaxO19, where x = 0 - 8 from 2 to 360 K. The results suggest that for x > 3 the spin arrangement becomes non-collinear. The magnetic moment and anisotropy for x < 3 are roughly consistent with the random distribution of Ga3+ ions in all sites except for 2b. For x = 5.94 and 8.02 the relatively large anisotropy of the Curie temperature was found. The FMR measurements at T = 300 K were interpred using the g-tensor formulation.
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