Hoenig, H. E. and Wang, R. H. and Rossman, G. R. and Mercereau, J. E. (1972) Magneto-chemical studies with a new ultrasensitive superconducting quantum magnetometer. In: Proceedings of the 1972 Applied Superconductivity Conference, May 1-3, Annapolis, Maryland. IEEE , New York, pp. 570-574. https://resolver.caltech.edu/CaltechAUTHORS:20130717-141320580
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Abstract
A magnetometer utilizing quantum superconductivity as the basis for the flux sensor element has been designed and used for biochemical susceptibility measurements in the temperature range from 1.5°K to 300°K. The sensitivity and reproducibility of this instrument have been tested by measurements on small amounts of material of well-known susceptibilities. Using this instrument the temperature dependence of the magnetic susceptibilities of oxy- and metaquohemerythrin have been measured and for the first time their anti-ferromagnetic components have been unambigiously resolved. From this data the exchange coupling constants between the two high-spin iron (III) atoms in each subunit have been determined to be -77 and -134 cm^(-1) respectively.
| Item Type: | Book Section | ||||||||
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| Additional Information: | © 1972 IEEE. We wish to thank Dr. H. A. Notarys for several helpful discussions. Work supported in part by the Office of Naval Research, Contract No. N00014-67-A-0094-0013 and the International Business Machines Corporation Grant No. 30058 and Deutsche Forschungsgemeinschaft. | ||||||||
| Group: | Division of Geological and Planetary Sciences | ||||||||
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| Record Number: | CaltechAUTHORS:20130717-141320580 | ||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130717-141320580 | ||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||
| ID Code: | 39422 | ||||||||
| Collection: | CaltechAUTHORS | ||||||||
| Deposited By: | Tony Diaz | ||||||||
| Deposited On: | 20 Sep 2013 23:30 | ||||||||
| Last Modified: | 17 Nov 2022 22:28 |
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