Measurements of domain-wall energy density for amorphous rare earth–transition metal thin films
1990; American Institute of Physics; Volume: 68; Issue: 8 Linguagem: Inglês
10.1063/1.346208
ISSN1520-8850
AutoresRoger A. Hajjar, H-P. D. Shieh,
Tópico(s)Metallic Glasses and Amorphous Alloys
ResumoThe value of domain-wall energy density (σw) has been most often assumed to be proportional to (AxKu)1/2, where exchange stiffness (Ax) is usually calculated from the mean-field theory. We report a simple method to derive σw from the difference between the onset of expanding and collapsing fields (ΔH) for circular domains. A micro-Kerr hysteresis-loop tracer with submicrometer resolution is used to measure the destabilizing field of domains written thermomagnetically in TbFeCo and GdTbFeCo films.
Referência(s)