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Chaotic Motion of a Magnetic Domain Structure under an Alternating Field
Michinobu Mino,Yousuke Yamamoto 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Magnetic domains in a garnet thin film under alternating magnetic fields up to 2000 Hz havebeen investigated at room temperature. Domain structures and motions have been observed. Whenthe field frequency is low, the magnetization changes periodically, and the domain pattern has alabyrinth structure. When the amplitude and the driving frequency of the field are increased,irregular oscillations of the magnetization appear, and chaotic motions of the domain are observed. In this region, domain structures have a disk-like shape. These disks grow from some crystal defects,and a growing point shows a branch-like form.