Domain wall relaxation frequency and magnetocrystalline anisotropy constant in NiZn ferrites

1996 ◽  
Vol 160 ◽  
pp. 386-387 ◽  
Author(s):  
R. Valenzuela ◽  
J.T.S. Irvine
Keyword(s):  
Domain Wall ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Relaxation Frequency ◽  
Wall Relaxation

Magnetic Permeability and Relaxation Frequency in High Frequency Magnetic Materials.

2001 ◽  
Vol 674 ◽  
Author(s):  
M.I. Rosales ◽  
H. Montiel ◽  
R. Valenzuela
Keyword(s):  
High Frequency ◽  
Domain Walls ◽  
Magnetocrystalline Anisotropy ◽  
Low Frequency ◽  
Frequency Dispersion ◽  
Anisotropy Constant ◽  
Relaxation Frequency ◽  
Resonance Relaxation ◽  
Frequency Behavior

ABSTRACTAn investigation of the frequency behavior of polycrystalline ferrites is presented. It is shown that the low frequency dispersion (f < 10 MHz) of permeability is associated with the bulging of pinned domain walls, and has a mixed resonance-relaxation character, closer to the latter. It is also shown that there is a linear relationship between the magnetocrystalline anisotropy constant, K1, and the relaxation frequency. The slope of this correlation depends on the grain size. Such a relationship could allow the determination of this basic parameter from polycrystalline samples.

Magnetocrystalline Anisotropy and Twinning Stress of 10M and 2M Martensites in Ni-Mn-Ga System

2006 ◽  
Vol 512 ◽  
pp. 195-200 ◽  
Author(s):  
Nariaki Okamoto ◽  
Takashi Fukuda ◽  
Tomoyuki Kakeshita ◽  
Tetsuya Takeuchi
Keyword(s):  
Magnetic Field ◽  
Shear Stress ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
The Other ◽  
Magnetic Shear ◽  
Maximum Value ◽  
Twinning Plane ◽  
Twinning Shear ◽  
The Difference

Ni2MnGa alloy with 10M martensite exhibits rearrangement of martensite variants (RMV) by magnetic field, but Ni2.14Mn0.92Ga0.94 with 2M martensite does not. In order to explain the difference, we measured uniaxial magnetocrystalline anisotropy constant Ku and the stress required for twinning plane movement τreq in these alloys. Concerning the former alloy, the maximum value of magnetic shear stress acting across twinning plane τmag, which is evaluated as |Ku| divided by twinning shear, becomes larger than τr eq. On the other hand, concerning the latter alloy, the maximum of τmag is only one-tenth of τreq at any temperature examined. Obviously, the relation, τmag> τr eq, is satisfied when RMV occurs by magnetic field and vice versa. In this martensite, the large twinning shear of 2M martensite is responsible for small τmag and large τreq.

Domain Wall Relaxation in Nickel

1951 ◽  
Vol 83 (3) ◽  
pp. 683-684 ◽  
Author(s):  
W. P. Mason
Keyword(s):  
Domain Wall ◽  
Wall Relaxation

Temperature dependent first order magnetocrystalline anisotropy constant model for ferromagnetic metals

2020 ◽  
Vol 6 (12) ◽  
pp. 126114
Author(s):  
Pan Dong ◽  
Weiguo Li ◽  
Shifeng Zheng ◽  
Ying Li ◽  
Yong Deng ◽  
...  
Keyword(s):  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Temperature Dependent ◽  
First Order ◽  
Ferromagnetic Metals
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