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Macroscopic quantum tunneling in magnetic proteins

Awschalom, D. D. and Smyth, J. F. and Grinstein, G. and Divincenzo, D. P. and Loss, D.. (1992) Macroscopic quantum tunneling in magnetic proteins. Physical review letters, Vol. 68, H. 20. pp. 3092-3095.

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Official URL: http://edoc.unibas.ch/dok/A5254802

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Abstract

We report low-temperature measurements of the frequency-dependent magnetic noise and magnetic susceptibility of nanometer-scale antiferromagnetic horse-spleen ferritin particles, using an integrated dc SQUID microsusceptometer. A sharply defined resonance near 1 MHz develops below T approximately 0.2 K. The behavior of this resonance as a function of temperature, applied magnetic field, and particle concentration indicates that it results from macroscopic quantum tunneling of the Neel vector of the antiferromagnets.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Physical Society
ISSN:0031-9007
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:52

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