Quantum tunneling in magnetic systems of various sizes (invited)

作者: B. Barbara , L. C. Sampaio , J. E. Wegrowe , B. A. Ratnam , A. Marchand

DOI: 10.1063/1.352508

关键词:

摘要: Magnetic relaxation experiments constitute a unique method of determining the nature fluctuations in dissipative magnetic systems. At high temperatures these are thermal and strongly temperature dependent. low temperatures, where quantum dominate, becomes independent temperature. Such behavior has been observed many In this review we emphasize study ferromagnetic nanoparticles, layers, multilayers (including ‘‘domain wall junctions’’), large single crystals. The results shown to agree with theoretical predictions tunneling magnetization. When dissipation important, complex systems, time dependent WKB exponent needs be introduced.

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