| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnetization Reversal in Magnetic Bilayer Systems |
| Li-Peng Jin, Yong-Jun Liu** |
School of Physical Science and Technology, Yangzhou University, Yangzhou 225002
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| Cite this article: |
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Li-Peng Jin, Yong-Jun Liu 2019 Chin. Phys. Lett. 36 067504 |
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Abstract Magnetization reversal in magnetic soft/hard bilayer systems is studied analytically by means of a variational method for magnetic energies in a continuum model. The demagnetization curve is involved with nonlinear equations, and the solution is given implicitly in the form of Jacobi functions, which is valid for the total reversal process. Based on the non-trivial solutions, hysteresis loops, as well as the maximum energy product $(BH)_{\max}$ versus thicknesses of soft/hard layers are obtained. With regard to $(BH)_{\max}$, improvement of the remanence competes with loss of coercive force. As a result, an optimum condition exists. For a given thickness of the hard layer, the optimum condition at which the largest $(BH)_{\max}$ could be achieved is discussed, which is slightly different from previous works.
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Received: 03 March 2019
Published: 18 May 2019
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| PACS: |
75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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75.60.Jk
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(Magnetization reversal mechanisms)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11647316 and 11847313. |
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