Title :
Spin Torque Diode Spectroscopy of Quantized Spin Wave Excited in a Magnetic Tunnel Junction
Author :
Yamaguchi, Akinobu ; Fukushima, Akio ; Kubota, Hitoshi ; Yuasa, Shinji
Author_Institution :
Spintronics Res. Center, Nat. Inst. of Adv. Ind. Sci. & Technol. (AIST), Tsukuba, Japan
Abstract :
We systematically measured the spin torque diode spectra of a magnetic tunnel junction nanoelement as a function of external magnetic field and field angle using a homemade quasi-omnidirectional broadband electrical spectrometer. The electrical spectroscopies reveal a significant higher-order spin wave modes excited in the free layer, which is substantiated by an analytical model.
Keywords :
ferromagnetic resonance; magnetic tunnelling; spin polarised transport; spin waves; CoFeB-MgO-CoFeB; external magnetic field function; higher-order spin wave modes; magnetic tunnel junction; nanoelement; quantized spin wave; quasiomnidirectional broadband electrical spectrometer; spin torque diode spectra; spin torque diode spectroscopy; Junctions; Magnetic anisotropy; Magnetic resonance; Magnetic tunneling; Spectroscopy; Torque; Torque measurement; Ferromagnetic resonance; magnetic tunnel junction; microwave; spin transfer torque; spin wave;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2196684
