Micromechanical resonators are very useful for detection of magnetic torque. We have developed nanoscale torsional resonators fabricated within silicon nitride membranes, as a platform for magnetometry of nanoscale magnetic elements. We describe the rotational magnetic hysteresis of a 10 nm thick film deposited on a resonator, and a study of magnetic hysteresis in a single, 1 μm diameter permalloy disk. The torsional resonator is patterned using a dual beam scanning electron/focused ion system. For the 1 μm diameter disk, it is found to be possible to tune the conditions such that an apparent magnetic supercooling of vortex nucleation is observed, as would be suggested by the modified Landau theory of the C- to vortex-state switch as a first-order phase transition. Complementary transmission electron and Lorentz microscopy of the same structures have also been performed.
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1 April 2011
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Research Article|
Magnetism and Magnetic Materials|
March 22 2011
Nanomechanical torsional resonator torque magnetometry (invited) Available to Purchase
J. P. Davis;
J. P. Davis
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
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D. Vick;
D. Vick
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
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P. Li;
P. Li
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
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S. K. N. Portillo;
S. K. N. Portillo
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
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A. E. Fraser;
A. E. Fraser
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
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J. A. J. Burgess;
J. A. J. Burgess
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
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D. C. Fortin;
D. C. Fortin
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
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W. K. Hiebert;
W. K. Hiebert
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
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M. R. Freeman
M. R. Freeman
a)
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
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J. P. Davis
1
D. Vick
2
P. Li
2
S. K. N. Portillo
1
A. E. Fraser
1
J. A. J. Burgess
1,2
D. C. Fortin
1
W. K. Hiebert
2
M. R. Freeman
1,2,a)
1Department of Physics,
University of Alberta
, Edmonton, Alberta, T6G 2G7 Canada
2
National Institute for Nanotechnology
, Edmonton, Alberta, T6G 2M9 Canada
a)
Electronic mail: [email protected].
J. Appl. Phys. 109, 07D309 (2011)
Article history
Received:
September 29 2010
Accepted:
November 05 2010
Citation
J. P. Davis, D. Vick, P. Li, S. K. N. Portillo, A. E. Fraser, J. A. J. Burgess, D. C. Fortin, W. K. Hiebert, M. R. Freeman; Nanomechanical torsional resonator torque magnetometry (invited). J. Appl. Phys. 1 April 2011; 109 (7): 07D309. https://doi.org/10.1063/1.3540643
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