Magneto-chemical studies with a new ultrasensitive superconducting quantum magnetometer
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.
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.Attached Files
Published - Rossman_1973p570.pdf
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Additional details
- Eprint ID
- 39422
- Resolver ID
- CaltechAUTHORS:20130717-141320580
- Office of Naval Research (ONR)
- N00014-67-A-0094-0013
- International Business Machines Corporation
- 30058
- Deutsche Forschungsgemeinschaft (DFG)
- Created
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2013-09-20Created from EPrint's datestamp field
- Updated
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2022-11-17Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)