Patent ID: 7667933

Claim:
A magnetic oscillating device comprising: a first magnetic resonance layer with a first intrinsic magnetic resonance frequency f 1 ; a second magnetic resonance layer with a second intrinsic magnetic resonance frequency f 2 higher than the first intrinsic magnetic resonance frequency f 1 ; a nonmagnetic layer sandwiched between the first magnetic resonance layer and the second magnetic resonance layer; and a pair of electrodes which supplies a current perpendicularly to film planes of the first and second magnetic resonance layers, wherein a difference (f 2 −f 1 ) between the two intrinsic magnetic resonance frequencies is larger than half a resonance line width of the first magnetic resonance layer, and a ratio of the two intrinsic magnetic resonance frequencies f 2 /f 1 is 1.6 or less, and wherein the matched resonance frequency is different from both the first intrinsic magnetic resonance frequency f 1 and the second intrinsic magnetic resonance frequency f 2 .