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We observed that AC susceptibility of a weak random anisotropy magnet (weak RAM), amorphous NdGdFe, strongly depends on the excitation field, h 0 ; with increasing h 0 from 0.1 to 1Oe, both Reχ 0 and Imχ 0 become several times larger, and the ratio of Imχ 0 to Reχ 0 increases from about 0.1 to 1.0, suggesting that the average relaxation time becomes...
We propose resonant tunneling diode (RTD) oscillators with offset-fed slot antennas in THz and sub-THz range for high frequency and high output power oscillators at room temperature. We analyzed the dependence of the oscillation frequency and output power on RTD position along slot antenna using 3-dimensional electromagnetic-field simulation. The oscillation frequency and output power largely increase...
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