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Domain formation and evolution in ferroelectric materialsMalbec, Aurélien 05 1900 (has links)
No description available.
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Intrinsic magnetic aftereffect in Dy(Co,Ni)2 compoundsCarmichael, Christine Mary, Physics, Faculty of Science, UNSW January 1981 (has links)
Measurements were made of the rate of magnetization, and the magnetization of the series of Dy (Co, Ni)2 compounds to investigate the intrinsic magnetic after effect. This effect is demonstrated by the existence of an intrinsic coercivity such that a critical value of applied field, Hc, must be reached before the domain walls can move freely through the material. However there is some movement of domain walls of fields below Hc, and this gives rise to time dependent magnetization. The mechanisms by which the domain walls overcome the energy barrier to their motion at fields below Hc was investigated in pulsed field, and in steady fields. After measuring the critical field and magnetic moments of each sample, the pulsed field magnetometer results were analysed to show that there is a certain temperature above which the mechanism for domain wall motion appears to be that described by Taylor???s thermal activation model. Below that particular temperature, the magnetization rate depends on the reciprocal of the applied field, and an empirical model is suggested. Estimates are made of the number of spines contained in the average wall kink; the wall jump frequency and the energy barrier. A vibrating sample magnetometer was used to study the magnetization of the specimens in steady fields. The results indicate that both the mechanisms described above are in operation, with thermal activation being a possibility at temperatures as low as 4.2K.
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The influence of defects on the domain structure and properties of ferroelectricsZhao, Xiaofang., 赵晓芳. January 2011 (has links)
published_or_final_version / Mechanical Engineering / Doctoral / Doctor of Philosophy
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Magnetic domain wall dynamics in nanoscale thin film structuresKnutson, Carl Oliver, 1980- 29 August 2008 (has links)
Not available / text
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Intrinsic magnetic aftereffect in Dy(Co,Ni)2 compoundsCarmichael, Christine Mary, Physics, Faculty of Science, UNSW January 1981 (has links)
Measurements were made of the rate of magnetization, and the magnetization of the series of Dy (Co, Ni)2 compounds to investigate the intrinsic magnetic after effect. This effect is demonstrated by the existence of an intrinsic coercivity such that a critical value of applied field, Hc, must be reached before the domain walls can move freely through the material. However there is some movement of domain walls of fields below Hc, and this gives rise to time dependent magnetization. The mechanisms by which the domain walls overcome the energy barrier to their motion at fields below Hc was investigated in pulsed field, and in steady fields. After measuring the critical field and magnetic moments of each sample, the pulsed field magnetometer results were analysed to show that there is a certain temperature above which the mechanism for domain wall motion appears to be that described by Taylor???s thermal activation model. Below that particular temperature, the magnetization rate depends on the reciprocal of the applied field, and an empirical model is suggested. Estimates are made of the number of spines contained in the average wall kink; the wall jump frequency and the energy barrier. A vibrating sample magnetometer was used to study the magnetization of the specimens in steady fields. The results indicate that both the mechanisms described above are in operation, with thermal activation being a possibility at temperatures as low as 4.2K.
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Intrinsic magnetic aftereffect in Dy(Co, Ni)2 compounds /Carmichael, Christine Mary. January 1981 (has links)
Thesis (Ph. D.)--University of New South Wales, 1981. / Also available online.
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Magnetic domain wall dynamics in nanoscale thin film structuresKnutson, Carl Oliver, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.
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Physical properties of novel magnet heterostructuresDzero, Maxim O. Gorʹkov, L. P. January 2003 (has links)
Thesis (Ph. D.)--Florida State University, 2003. / Advisor: Dr. L.P. Gorʹkov, Florida State University, Dept. of Physics. Title and description from dissertation home page (viewed Nov. 24, 2003). Includes bibliographical references.
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Excitation of spin waves at magnetic domain walls /Limaye, Pradeep Shrikrishna January 1980 (has links)
No description available.
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Domain wall resonance in magnetic bubble films /Parker, Alan A. January 1980 (has links)
No description available.
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