Applied-field independent modes in an antiferromagnet with a small and negative cubic-anisotropy constant

1973 ◽  
Vol 8 (8) ◽  
pp. 500-502
Author(s):  
T. J. Fairclough
2001 ◽  
Vol 90 (12) ◽  
pp. 6243-6250 ◽  
Author(s):  
J. Geshev ◽  
L. G. Pereira ◽  
J. E. Schmidt ◽  
M. Mikhov

New values have been obtained for the magnetoelastic coefficients h 3 and h 4 of nickel at room temperature from ferromagnetic resonance experiments on (100) single crystal nickel films. The ratios of h 3 / h 1 and h 4 / h 1 are found to be 0.091 ± 0.007 and 0.153 ± 0.015 respectively which give h 3 = (- 8.5 ± 0.7) x 10 -6 and h 4 = (- 14.3 ± 1.4) x 10 -6 if the Lee & Asgar value of h 3 is used (- 94 x 10 -6 ). The magnetocrystalline anisotropy constant K 1 , the saturation magnetization M and the spectroscopic splitting factor g have been measured also. It is found that K 1 = ( - 5.4 ± 0.3) x 10 4 erg/cm 3 and that g = 2.161 ± 0.009 in agreement with published data on bulk samples but that the value of M is found to be higher than the bulk value by 1.6%. The discrepancies between the values of h 3 , h 4 and M as reported here and the bulk values are discussed. The theory of feromagnetic resonance has been extended to cover the five-constant representation of magnetostriction and to the K 3 anisotropy term. The effect of the g factor having cubic anisotropy on the resonance conditions has been calculated.


2000 ◽  
Vol 284-288 ◽  
pp. 1237-1238 ◽  
Author(s):  
R Zuberek ◽  
E Mosiniewicz-Szablewska ◽  
H Szymczak ◽  
K Fronc ◽  
K Swiatek ◽  
...  

1970 ◽  
Vol 48 (17) ◽  
pp. 1984-1990 ◽  
Author(s):  
E. A. Falquero ◽  
W. V. Youdelis

The effect of field strength at constant temperature on the effective charge of carbon in gamma iron in electrotransport experiments is determined. At 950 °C the total effective charge is 4.5 for a field of 0.106 V cm−1, rising to a value of 13.6 at approximately 0.028 V cm−1, and falling rapidly at lower fields. Similar results are encountered at 920 and 980 °C; the temperature dependence of the total effective charge is not marked. It is proposed that carbon transport occurs by two processes: vacancy transport, which is activated by a field of approximately 0.028 V cm−1 but is field independent at higher fields, and interstitial transport, the rate of which is proportional to the applied field. The rate of vacancy transport is determined by an activation energy of 42 kcal/mole. The effective charge for purely interstitial carbon electrotransport is strongly temperature dependent; charge values of 2.5, 1.5, and 0.6 were obtained at 920, 950, and 980 °C respectively.


Author(s):  
C. Gao ◽  
C. Dong ◽  
J. Herfort ◽  
O. Brandt ◽  
C. Jia ◽  
...  

1992 ◽  
Vol 2 (10) ◽  
pp. 1803-1809
Author(s):  
V. K. Dolganov ◽  
G. Heppke ◽  
H.-S. Kitzerow

2015 ◽  
Vol 63 (2) ◽  
pp. 37-44 ◽  
Author(s):  
Daisuke ICHIHARA ◽  
Shota HARADA ◽  
Hisashi KATAOKA ◽  
Shigeru YOKOTA ◽  
Akihiro SASOH

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