• Kumar, Akash
• Åkerman, Johan
• Muduli, P. K.
• Dürrenfeld, Philipp
• Pandya, D. K.
• Chaudhary, Sujeet
• Behera, Nilamani
• Tiwari, Dhananjay

Abstract

<jats:p>We perform spin torque ferromagnetic resonance measurements on the Si(100)/TiN(100)/epi-Py(100)/β-Ta system. We demonstrate current induced modulation of the Gilbert damping constant, which is about 30% for a current density of 6.25 × 109 A/m2. We show that the observed modulation of the Gilbert damping constant cannot be explained by spin transfer torques arising from the spin Hall effect of the β-Ta layer. An additional mechanism such as antidamping spin-orbit torque resulting from the interface or the crystalline structure of Py thin films needs to be considered.</jats:p>

Topics

• density
• impedance spectroscopy
• thin film
• current density
• tin