Magnetization Reversal in Magnetic Bilayer Systems

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 88-92
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/36/6/067504

摘要

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.