Properties of ferromagnetic film hysteresis, on the surface of a hard-magnetic antiferromagnet, with a domain structure
| Autor: | Alexander S. Kovalev, Maryna Pankratova |
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| Rok vydání: | 2014 |
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| Zdroj: | Low Temperature Physics. 40:990-1001 |
| ISSN: | 1090-6517 1063-777X |
| Popis: | This is a theoretical investigation of the exchange bias phenomenon, and the properties of a thin magnetic film's magnetization hysteresis loop, on the rough surface of a hard-magnetic antiferromagnet. An interface model with a periodic structure of atomic steps is presented. These atomic steps are associated with a spatially inhomogeneous distribution of the ferromagnetic film magnetization, akin to a system of domain walls. This structure leads to a complicated external field dependence of magnetization: the hysteresis curve can assume an asymmetrical shape and “fall apart” into two hysteresis loops, divided by a “horizontal plateau,” or an area with constant field-independent magnetization. Such field dependence behavior has been recently observed experimentally in different ferro/antiferromagnet systems. The field dependence of magnetization has been obtained analytically using the long-wave approximation for various characteristics of ferromagnetic film (its thickness, values of exchange interaction,... |
| Databáze: | OpenAIRE |
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