THE EFFECT OF HEAT TREATMENT ON THE FERROMAGNETIC RESONANCE OF LUTECIUM IRON GARNET AND MANGANESE FERRITE SINGLE CRYSTALS.
EMMANUEL COLL BOSTON MASS ORIENTAL SCIENCE LIBRARY
Pagination or Media Count:
In this paper, the Effects of different heat treatments on the ferromagnetic resonance of lutecium iron garnet Lu3Fe5O12 and manganese ferrite MnFe2O4 single crystals are investigated. The two heat treatments applied are, respectively, 700C in air for one hour and 700C in oxygen for ten hours. It is found that these treatments have no significant effect on the values of K1Ms and the g-factors, except that the anisotropy of the resonance line width delta H decreases appreciably. Although the effect on delta H of Lu3Fe5O12 is small, the delta H value of MnFe2O4 increases several times after each treatment. The cause for the variation of delta H with heat treatment is discussed. X-ray diffraction patterns show that a small quantity of alpha-Fe2O3 precipitates in the manganese ferrite specimen after the latter is subjected to heat treatment. Author
- Ceramics, Refractories and Glass
- Solid State Physics