Studies of the Ionic Ferromagnet (LaPb)MnO3. VI. Antiresonance and the Ferromagnetic Resonance Line Shape

1971 ◽  
Vol 49 (3) ◽  
pp. 387-390 ◽  
Author(s):  
S. T. Wang ◽  
C. W. Searle
Keyword(s):  
Line Width ◽  
Ferromagnetic Resonance ◽  
Line Shape ◽  
Qualitative Agreement ◽  
Resonance Line ◽  
Skin Depth ◽  
Frequency Range ◽  
The Family

The resonance line shape and line width of the family La(1−x)PbxMnO3 have been examined from 77 to 430 °K in a frequency range from 13 to 25 GHz. The distorted line shape is in qualitative agreement with a calculation that includes the effect of the skin depth. The antiresonance condition has been observed and it is also in qualitative agreement with theory.

Studies of the ionic ferromagnet (LaPb)MnO3 III. Ferromagnetic resonance studies

1969 ◽  
Vol 47 (23) ◽  
pp. 2703-2708 ◽  
Author(s):  
C. W. Searle ◽  
S. T. Wang
Keyword(s):  
Critical Temperature ◽  
Conduction Band ◽  
Ferromagnetic Resonance ◽  
Low Temperatures ◽  
Resonance Line ◽  
Isotropic Shift ◽  
Sharp Minimum ◽  
Asymmetric Behavior ◽  
Spin Polarized ◽  
The Family

Ferromagnetic resonance has been observed in single crystals of the family La1−xPbxMnO3with 0.25 < x < 0.45 from 13 to 25 GHz and in the temperature range from 77 to 430 °K. The line width, ΔH, exhibits a sharp minimum accompanied by an isotropic shift in the resonance line at a critical temperature, Tc. Tc is dependent on the concentration of Mn4+ and has been related to the Curie temperature. The shift in the peak of the resonance line at Tc can be described by effects related to the formation of a spin-polarized conduction band. The line shape is asymmetric at high temperatures, ~Tc, and at low temperatures, T ~ 77 °K. This asymmetric behavior of the line is probably due to transport properties of the conduction-band electrons.

Ferromagnetic resonance line width in insulating materials

1956 ◽  
Vol 1 (3) ◽  
pp. 129-136 ◽  
Author(s):  
A.M. Clogston ◽  
H. Suhl ◽  
L.R. Walker ◽  
P.W. Anderson
Keyword(s):  
Line Width ◽  
Ferromagnetic Resonance ◽  
Resonance Line ◽  
Insulating Materials ◽  
Resonance Line Width
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