RADIAL CONTRACTION OF THE FIRST KIND OF DUMBBELL DOMAINS SUBJECTED TO A STATIC BIAS FIELD
LIU DA-PENG (刘大鹏)b, HAN BAO-SHAN (韩宝善)abc, NIE XIANG-FU (聂向富)c, J. Ben Youssefd, J. M. Desvignesd, H. Le Galld
a State Key Laboratory for Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China; b Huabei Institute of Electric Power, Baoding 071003, China; c Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China; d Laboratoire de Magnetisme et Materiaux Magnetiques, C.N.R.S. 92195 Meudon Cedex, France
Abstract On the basis of the "exercise" experiment and the phenomenon of "self-shrink", the behavior of "less-stable" IDs (first kind of dumbbell domains) in radial contraction under an "exercise" bias field, (Hb)e, was statistically investigated in detail. It was found that the histograms of their stripe-to-bubble transition field, Hsb after exercise, become narrower and shift towards the side of lower Hsb with the increase of (Hb)e. It illustrates how the less-stable IDs lose part of their vertical Bloch lines under different (Hb)e. In addition, it was also found that the curve of the upper boundary of these histograms, (Hsb)max vs. (Hb)e, consists of two segments of straight lines. This discontinuity was proved to be due to self shrink, and the crosspoint of these two lines is just the lower limit of the self-shrink region. Furthermore, a series of photographs were taken to show the effect of radial contraction on less-stable IDs intuitively.
Received: 23 September 1995
Accepted manuscript online:
PACS:
75.70.Kw
(Domain structure (including magnetic bubbles and vortices))
Fund: Supported in part by the National Natural Science Foundation of China and by the Natural Science Foundation of Hebei Province.
Cite this article:
LIU DA-PENG (刘大鹏), HAN BAO-SHAN (韩宝善), NIE XIANG-FU (聂向富), J. Ben Youssef, J. M. Desvignes, H. Le Gall RADIAL CONTRACTION OF THE FIRST KIND OF DUMBBELL DOMAINS SUBJECTED TO A STATIC BIAS FIELD 1995 Acta Physica Sinica (Overseas Edition) 4 462
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