On the Determination of Magnetocrystalline Anisotropy Constants from Torque Measurements

1957 ◽  
Vol 28 (3) ◽  
pp. 340-343 ◽  
Author(s):  
J. S. Kouvel ◽  
C. D. Graham
Keyword(s):  
Magnetocrystalline Anisotropy ◽  
Torque Measurements

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.

FERROMAGNETIC RESONANCE IN TERFENOL-D AT 17 GHz

2001 ◽  
Vol 15 (24n25) ◽  
pp. 3266-3269 ◽  
Author(s):  
G. DEWAR ◽  
S. PAGEL ◽  
P. SOURIVONG
Keyword(s):  
Magnetic Field ◽  
Ferromagnetic Resonance ◽  
Elastic Strain ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Temperature Range ◽  
Torque Measurements ◽  
The Magnetic Field

Ferromagnetic resonance measurements have been performed on several samples of Terfenol-D ( Dy0.73Tb0.27Fe1.95 ) at 16.95 GHz and over the temperature range 293 to 305 K. We find that the first magnetocrystalline anisotropy constant, obtained from one sample under nearly zero stress, is K1 = (-1.4±1.0)× l06 erg/cm 3 at 294 K. Our measurement is distinct from quasistatic torque measurements in that the lattice does not deform during the measurement and, hence, the anisotropy contribution due to magnetoelastic strain does not enter. The bare anisotropy constant, unmodified by static elastic strain, is [Formula: see text] and [Formula: see text]. The samples exhibited hysteresis; the position of FMR shifted by 4.0 kOe between measurements made with the magnetic field increasing and those made with the field decreasing.

High-field cantilever magnetometry as a tool for the determination of the magnetocrystalline anisotropy of single crystals

2006 ◽  
Vol 418 (1-2) ◽  
pp. 21-30 ◽  
Author(s):  
Fátima Martín-Hernández ◽  
Iris M. Bominaar-Silkens ◽  
Mark J. Dekkers ◽  
Jan Kees Maan
Keyword(s):  
Single Crystals ◽  
High Field ◽  
Magnetocrystalline Anisotropy
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