engleski

EPR detection of the magnetic field on the surface of a single crystal of the molecule magnet Mn12-acetate

EPR technique has been used as a method for measuring magnetic field and magnetic field gradient on the surface of a single crystal of the nanomagnet Mn12-acetate. As the EPR probe we used fibrous needle of the organic conductor NMP-TCNQ. The splitting and the shift of the resonant lines of the probe at different orientation of the single crystal in the magnetic field was measured in the temperature range 300-5K. The shifts of the lines yield the magnitude of the additional magnetic field on Mn12-acetate. In conjuction with electron microscopy, the shifts yield the magnetic field gradient at the crystal surface as a function of the temperature. The dynamic properties of detected local field have been examined at the microsecond time scale by employing Pulse EPR in the low temperature interval.

EPR; molecule magnet; Mn12-acetate

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