Determination of magnetization rotation and domain wall motion components in reversible complex susceptibility spectra of Co-based amorphous ribbons with various annealing times

2002 ◽  
Vol 242-245 ◽  
pp. 261-264 ◽  
Author(s):  
S.S. Yoon ◽  
S.D. Kwon ◽  
Jong-Ho Kim ◽  
C.G. Kim
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Magnetization Rotation ◽  
Amorphous Ribbons ◽  
Complex Susceptibility

Influence of Annealing Temperature on Magnetic Properties in Co-Based Amorphous Ribbons

2004 ◽  
Vol 449-452 ◽  
pp. 1049-1052
Author(s):  
Li Jin ◽  
Y.W. Rheem ◽  
Cheol Gi Kim ◽  
De Sheng Sun ◽  
Chong Oh Kim ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Domain Wall ◽  
Exchange Bias ◽  
Wall Motion ◽  
Annealing Temperature ◽  
Domain Wall Motion ◽  
Bias Field ◽  
Crystalline Layer ◽  
Magnetization Rotation ◽  
Amorphous Ribbons

The magnetic properties were investigated on Co66Fe4B15Si15 amorphous ribbons of annealed at temperature range from 473 K to 773 K in vacuum (A-batch) and open air (B-batch). Static permeability from domain wall motion decreases with annealing temperature both in A- and B-batch sample. The permeability from magnetization rotation increases up to 700 K annealing temperature, but then decreases. The GMI profiles show a symmetric curve in A-batch samples irrespective of annealing temperature. In B-batch samples, symmetric profiles are shown up to 650 K annealing temperature, while they becomes asymmetric for further annealing temperature, due to the exchange bias-field induced by surface crystalline layer.

ANALYTICAL DETERMINATION OF NUCLEATION FIELD AND MAGNETIC REVERSAL MODES IN EXCHANGE-COUPLED NANOLAYERS

2009 ◽  
Vol 23 (25) ◽  
pp. 2955-2961 ◽  
Author(s):  
G.-P. ZHAO ◽  
CHUN YANG ◽  
C.-W. XIAN ◽  
Y.-P. FENG
Keyword(s):  
Domain Wall ◽  
Layer Thickness ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Analytical Determination ◽  
Magnetic Reversal ◽  
Soft Layer ◽  
Reversal Process ◽  
The One

General formulae for coherent/incoherent nucleation fields have been obtained as functions of the thickness of the hard and soft layers within a self-contained micromagnetic model for a hard/soft trilayer. The nucleation modes are determined reliably by direct comparison of the nucleation fields for different modes. It is shown that coherent nucleation cannot take place no matter how small the layer thickness. For small soft layer thickness, the magnetic reversal mode is an incoherent nucleation. As the soft layer thickness increases, the dominant magnetic reversal process is domain-wall motion/pinning. Analyses demonstrate that negative nucleation field and very small coercivity occur when the easy axes of neighboring layers are perpendicular. The results could shade light on Brown's coercivity paradox (where the measured coercivity is much smaller than the one given by the previous theories).

Synthesis and Crystal Structure of Hexagonal DyMnO3

2004 ◽  
Vol 449-452 ◽  
pp. 1045-1048 ◽  
Author(s):  
Naoki Kamegashira ◽  
Hirohisa Sato ◽  
Satoshi Ashizuka
Keyword(s):  
Crystal Structure ◽  
Exchange Bias ◽  
Wall Motion ◽  
Annealing Temperature ◽  
Domain Wall Motion ◽  
Bias Field ◽  
Synthesis And Crystal Structure ◽  
Crystalline Layer ◽  
Magnetization Rotation ◽  
Amorphous Ribbons

The magnetic properties were investigated on Co66Fe4B15Si15 amorphous ribbons of annealed at temperature range from 473 K to 773 K in vacuum (A-batch) and open air (B-batch). Static permeability from domain wall motion decreases with annealing temperature both in A- and B-batch sample. The permeability from magnetization rotation increases up to 700 K annealing temperature, but then decreases. The GMI profiles show a symmetric curve in A-batch samples irrespective of annealing temperature. In B-batch samples, symmetric profiles are shown up to 650 K annealing temperature, while they becomes asymmetric for further annealing temperature, due to the exchange bias-field induced by surface crystalline layer.

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