Investigation of the effect of uniaxial pressure on antiferromagnetic resonance in KFe11O17 Crystals |
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| Authors: | V N Vasil’ev E N Matveiko |
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| Institution: | (1) L. V. Kirenskii Institute of Physics, Siberian Branch of the Russia Academy of Sciences, 660036 Krasnoyarsk, Russia |
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| Abstract: | The deformation dependence of the resonance field in KFe11O17 single crystals was investigated by the AFMR method. The measurements were performed at T=77 K and ν=47.52 GHz for two orientations of the external pressure. The experimental data are discussed in terms of a model of a very
simple easy-plane antiferromagnet taking account of the elastic and magnetoelastic contributions to the thermodynamic potential.
The magnetostriction, magnetoelastic, and elastic contants are calculated and the results are λ=1.94×10−5, B
1=2.75×108 erg/cm3, and C
11−C
12=1.42×1013 erg/cm3, respectively. The alues of these constants imply that the origin of the initial gap in the AFMR spectrum is not of magnetoelastic
origin.
Fiz. Tverd. Tela (St. Petersburg) 40, 513–515 (March 1998) |
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