Cormier M, Ferré J, Mougin A, Cromières JP, Klein V. High resolution polar Kerr magnetometer for nanomagnetism and nanospintronics.
Rev Sci Instrum 2008;
79:033706. [PMID:
18377014 DOI:
10.1063/1.2890839]
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Abstract
A new high resolution polar magneto-optical (MO) Kerr magnetometer, devoted to the study of nanometer sized elements with perpendicular magnetic anisotropy, is described. The unique performances of this setup in terms of sensitivity (1.2x10(-15) emu), stability (lateral drift +/-35 nm over 3 h), and resolution (laser spot full width at half maximum down to 470 nm) are demonstrated, and illustrated by Kerr hysteresis loop measurements on a unique ultrathin magnetic nanodot, and over small segments of ultranarrow magnetic tracks. Large scanning MO Kerr microscopy images were also obtained with the same performances.
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