An analytical computation of magnetic field generated from a cylinder ferromagnet

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:452

Article

Taniguchi, Tomohiro¹ 

[1] Natl Inst Adv Ind Sci & Technol, Spintron Res Ctr, Tsukuba, Ibaraki 3058568, Japan

关键词: Computation of magnetizing field;    Stray field;    Demagnetization factor;    Analytical theory;   

DOI  :  10.1016/j.jmmm.2017.11.078

来源: Elsevier

【 摘 要 】

An analytical formulation to compute a magnetic field generated from an uniformly magnetized cylinder ferromagnet is developed. Exact solutions of the magnetic field generated from the magnetization pointing in an arbitrary direction are derived, which are applicable both inside and outside the ferromagnet. The validities of the present formulas are confirmed by comparing them with demagnetization coefficients estimated in earlier works. The results will be useful for designing practical applications, such as high-density magnetic recording and microwave generators, where nanostructured ferromagnets are coupled to each other through the dipole interactions and show cooperative phenomena such as synchronization. As an example, the magnetic field generated from a spin torque oscillator for magnetic recording based on microwave assisted magnetization reversal is studied. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free