Title :
Activation volumes of magnetic aftereffects: role of the chemical potential in nanomagnets
Author :
Bennett, L.H. ; Della Torre, Edward ; Watson, R.E.
Author_Institution :
George Washington Univ., Ashburn
Abstract :
This paper demonstrates how to correct the activation volume of a nanomagnet derived from the aftereffect measurement for this chemical potential variation, after which the volume is essentially temperature independent, and is identified with the physical volume. Results show that the apparent large temperature dependence of the activation volume in nanostructures is due to the omission of the chemical potential in the formulation.
Keywords :
Bose-Einstein condensation; chemical potential; cobalt; magnetic aftereffect; magnetic multilayers; magnets; magnons; nanostructured materials; platinum; Bose-Einstein condensation; Co-Pt; chemical potential; columnar multilayer; magnetic aftereffect experiment; magnon; nanomagnets; nanostructures; thermal activation volumes; Chemicals; Energy barrier; Fluctuations; Hafnium; Magnetic domains; Magnetic field measurement; Magnetic multilayers; Saturation magnetization; Temperature dependence; Volume measurement;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.374865
