An optimal magnetic tip configuration for magnetic-resonance force microscopy of microscale buried features
作者:
John A. Marohn,
Rau´l Fainchtein,
Doran D. Smith,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 73,
issue 25
页码: 3778-3780
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.122892
出版商: AIP
数据来源: AIP
摘要:
To date, magnetic-resonance force microscopes employing a magnetic-field gradient source mounted to a microcantilever have suffered from a deleterious dependence of the effective cantilever spring constant on the external magnetic field. A “magnet-on-tip” configuration is introduced in which this dependence has been decreased by at least 200 fold, making it feasible to perform arbitrary-sample micron-scale magnetic resonance force microscopy at very high magnetic field. Alternating-gradient cantilever magnetometry is used to quantify the effect and to prove that the existing model of the tip-field interaction is only qualitatively correct. A model is proposed which quantitatively describes the tip-field interaction in the traditional tip configuration. ©1998 American Institute of Physics.
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