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Magneto-optical Kerr effect analysis of magnetic nanostructures
被引:161
作者:
Allwood, DA
[1
]
Xiong, G
[1
]
Cooke, MD
[1
]
Cowburn, RP
[1
]
机构:
[1] Univ Durham, Dept Phys, Nanomagnet Grp, Durham DH1 3LE, England
关键词:
NANOWIRES;
DOMAIN;
ENHANCEMENT;
MULTILAYERS;
FILMS;
D O I:
10.1088/0022-3727/36/18/001
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
We present a treatment of polarized light analysis and noise sources relevant to magneto-optical Kerr effect (MOKE) measurements of magnetic nanostructures and give performance details of our state-of-the-art MOKE magnetometer in these terms. By considering the various signal contributions, we are able to determine experimental conditions for optimal MOKE signal dynamic range and signal-to-noise ratio. A description of our MOKE instrument includes a novel facility to locate magnetic nanostructures by producing a susceptibility map of the sample surface. The performance of the magnetometer is demonstrated by hysteresis loops of single 100-200 nm wide magnetic nanowires, including a loop obtained with no time averaging during a single magnetic field cycle.
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页码:2175 / 2182
页数:8
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