期刊
APPLIED PHYSICS EXPRESS
卷 3, 期 7, 页码 -出版社
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/APEX.3.073001
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资金
- Ministry of Internal Affairs and Communications
- Ministry of Education, Culture, Sports, Science and Technology [A19206002]
We report on rf current-induced excitation of the ferromagnetic resonance in CoFeB/MgO/CoFeB magnetic tunnel junctions under a perpendicular magnetic field. By choosing an appropriate external field and using an Fe-rich CoFeB free layer, the effective precession of the free layer could be excited. In a measurement of homodyne detection, a large dc output voltage of 180 mu V was obtained when an rf signal power of -25 dBm was applied. The sensitivity of this junction, as an rf rectifier, reaches about 170 mV/mW (280 mV/mW after impedance matching correction), which is the same order compared with that of a Schottky diode operated at room temperature.
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