scholarly journals Dependence of the magnetization and remanence of single-domain particles on the second cubic anisotropy constant

2001 ◽  
Vol 90 (12) ◽  
pp. 6243-6250 ◽  
Author(s):  
J. Geshev ◽  
L. G. Pereira ◽  
J. E. Schmidt ◽  
M. Mikhov
Keyword(s):  
Anisotropy Constant ◽  
Single Domain ◽  
Cubic Anisotropy

The magnetic properties of single-domain particles with cubic anisotropy. II. Remanence curves

1993 ◽  
Vol 5 (17) ◽  
pp. 2793-2808 ◽  
Author(s):  
M Walker ◽  
P I Mayo ◽  
K O O'Grady ◽  
S W Charles ◽  
R W Chantrell
Keyword(s):  
Magnetic Properties ◽  
Single Domain ◽  
Cubic Anisotropy

Squareness of NdFeB Stoner-Wohlfarth Hysteresis

2014 ◽  
Vol 802 ◽  
pp. 601-606
Author(s):  
Marcos Flavio de Campos ◽  
Fernanda A.S. da Silva ◽  
José Adilson de Castro
Keyword(s):  
Particle Size ◽  
General Result ◽  
Anisotropy Constant ◽  
Single Domain ◽  
Single Domain Particle ◽  
Hysteresis Curves ◽  
Intrinsic Coercivity ◽  
Grain Diameter

Hysteresis curves were calculated according the Stoner-Wohlfarth (SW) model using values of K2/K1from zero up to 0.25 (where K2is the 2ndorder anisotropy constant and where K1is the 1storder anisotropy constant). The SW calculations assume Nd2Fe14B nanocrystalline magnets with single domain particle size (grain diameter less than 150 nm). The effect of K2on several index of merit of magnets as BHmaxand squareness are discussed. As a general result, increasing K2, the intrinsic coercivity increases. However, the increase of K2almost does not improve the BHmaxof isotropic magnets. It is found that the effect of the K2/K1ratio is coupled with the effect of texture, i.e., the effect of K2is more significant for pronounced texture.

The magnetoelastic coefficients h 3 and h 4 of (100) nickel films

1972 ◽  
Vol 328 (1572) ◽  
pp. 49-65 ◽  
Keyword(s):  
Single Crystal ◽  
Saturation Magnetization ◽  
Ferromagnetic Resonance ◽  
Room Temperature ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Published Data ◽  
Nickel Films ◽  
Splitting Factor ◽  
Cubic Anisotropy

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.

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