ANNIHILATION OF VERTICAL-BLOCH-LINE CHAINS IN THE WALLS OF THE SECOND KIND OF DUMBBELL DOMAINS SUBJECTED TO AN IN-PLANE FIELD
TANG GUI-DE (唐贵德)a, NIE XIANG-FU (聂向富)a, SUN HUI-YUAN (孙会元)a, MENG GUANG-QING (孟广庆)b, HAN BAO-SHAN (韩宝善)b
a Department of Physics Hebei Teachers University, Shijiazhuang 050016, China; b Laboratory of Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
Abstract An experiment was statistically performed on the annihilation of vertical-Bloch-line (VBL) chains in the walls of the second kind of dumbbell domains (ⅡDs) subjected to an in-plane field Hip. It was again confirmed that there is a critical in-plane field H′ip, above which all VBL chains of hard domains in garnet bubble films, including ⅡDa, disappear. Just like ordinary hard bubbles (OHBs), it was also found that there exists a critical range of Hip, from (Hip)ID to H′ip, for ⅡD softening. Over this range, with the increase of Hip, more and more ⅡDs are softened, accompanied by the successive appearance of the first kind of dumbbell domains, OHBs and soft bubbles. In addition, for the five samples tested, the ratio, H′ip/(Hip)ID, is obviously greater than 21/2.
Received: 15 December 1992
Accepted manuscript online:
PACS:
75.70.Kw
(Domain structure (including magnetic bubbles and vortices))
TANG GUI-DE (唐贵德), NIE XIANG-FU (聂向富), SUN HUI-YUAN (孙会元), MENG GUANG-QING (孟广庆), HAN BAO-SHAN (韩宝善) ANNIHILATION OF VERTICAL-BLOCH-LINE CHAINS IN THE WALLS OF THE SECOND KIND OF DUMBBELL DOMAINS SUBJECTED TO AN IN-PLANE FIELD 1993 Acta Physica Sinica (Overseas Edition) 2 863
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