Details

Autor(en) / Beteiligte

• Hamadeh, A
• d'Allivy Kelly, O
• Hahn, C
• Meley, H
• Bernard, R
• Molpeceres, A H
• Naletov, V V
• Viret, M
• Anane, A
• Cros, V
• Demokritov, S O
• Prieto, J L
• Muñoz, M
• de Loubens, G
• Klein, O

Titel

Full control of the spin-wave damping in a magnetic insulator using spin-orbit torque

Ist Teil von

• Physical review letters, 2014-11, Vol.113 (19), p.197203-197203, Article 197203

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2014

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• It is demonstrated that the threshold current for damping compensation can be reached in a 5  μm diameter YIG(20  nm)|Pt(7  nm) disk. The demonstration rests upon the measurement of the ferromagnetic resonance linewidth as a function of I(dc) using a magnetic resonance force microscope (MRFM). It is shown that the magnetic losses of spin-wave modes existing in the magnetic insulator can be reduced or enhanced by at least a factor of 5 depending on the polarity and intensity of an in-plane dc current I(dc) flowing through the adjacent normal metal with strong spin-orbit interaction. Complete compensation of the damping of the fundamental mode by spin-orbit torque is reached for a current density of ∼3×10(11)  A·m(-2), in agreement with theoretical predictions. At this critical threshold the MRFM detects a small change of static magnetization, a behavior consistent with the onset of an auto-oscillation regime.