| 摘要 |
PURPOSE:To derive a two-dimensional electron spin distribution of a sample by providing a local magnetic field modulation coil so as to be opposed to the sample and scanning two-dimensionally the sample or a modulation coil by using said coil. CONSTITUTION:By an XY stage 13, a sample 23 is scanned in the X and Y directions and a magnetic field sweep is executed in each position, and by a modulation coil 25, a magnetic field modulation is executed by, for instance, 100kHz and an absorbing signal by an electron spin resonance is detected. A detecting signal is fetched in a form that a carrier of, for instance, 9GHz has been modulated by 100kHz from a directional coupler 31, detected by a detector 33, and also, only a 100kHz component is detected by a narrow-band amplifier 35. By bringing said component to phase detection by 100kHz from a modulating signal generator 27, a resonance signal by an electron spin of a part opposed to a modulation coil is detected as a differential waveform. In such a way, a two-dimensional electron spin distribution of the sample can be derived. |
