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Ground state magnetization distribution and characteristic width of head to head domain wall in Fe‐rich amorphous microwire
Author(s) -
Gudoshnikov S. A.,
Grebenshchikov Yu. B.,
Ljubimov B. Ya.,
Palvanov P. S.,
Usov N. A.,
Ipatov M.,
Zhukov A.,
Gonzalez J.
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881254
Subject(s) - amorphous solid , magnetization , domain wall (magnetism) , head (geology) , condensed matter physics , materials science , amorphous metal , core (optical fiber) , saturation (graph theory) , magnetic domain , metal , physics , composite material , magnetic field , chemistry , crystallography , geology , metallurgy , mathematics , quantum mechanics , geomorphology , combinatorics
The total magnetic charges of head to head domain walls, Q = 〈 M z 〉 S , are measured for a family of amorphous glass‐coated Fe‐rich microwires by means of time integration of the electro‐motive force signals induced in a pick‐up coil wound around the wire. Here 〈 M z 〉 is the average longitudinal wire magnetization and S is the cross‐section of the wire metallic core. The measured values of 〈 M z 〉 = 1100–1200 emu/cm 3 are close to the wire saturation magnetization. This means that Fe‐rich microwires of given family are nearly uniformly magnetized in its ground state, far from the wire ends. The characteristic width of the head to head domain wall is estimated to be δ ∼ (40–75) d , depending on the wall velocity, where d is the metallic core diameter. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)