Details

Autor(en) / Beteiligte

• Huang, H.B.
• Ma, X.Q.
• Zhao, C.P.
• Liu, Z.H.
• Chen, L.Q.

Titel

Micromagnetic study of high-power spin–torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar under external magnetic fields

Ist Teil von

• Journal of magnetism and magnetic materials, 2015-01, Vol.373, p.10-15

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We investigated the high-power spin–torque oscillator in a half-metallic Heusler alloy Co2MnSi spin-valve nanopillars with perpendicular magnetization under external magnetic field using micromagnetic simulations. Our simulations show that the narrow optimum current of magnetization precession in the Heusler-based spin valve is broadened by introducing the surface anisotropy. The linear decrease of frequency with the out-of-plane magnetic field is obtained in our simulation. Additionally, the in-plane magnetic field dependence of frequency shows a parabolic curve which is explained by the magnetization trajectory tilting. Furthermore, we also discussed the decrease of output power using the excitation of non-uniform magnetization precession in the in-plane magnetic fields. •We investigated spin–torque oscillator in Co2MnSi spin-valve under magnetic fields.•The narrow optimum current is broadened by introducing the surface anisotropy.•The frequency dependences of out-of-plane and in-plane magnetic fields show linear and parabola.•The results may give the guidance for designing Heusler-based spin–torque oscillator.