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Magneto-chemical studies with a new ultrasensitive superconducting quantum magnetometer

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.

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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
Rossman, G. R.0000-0002-4571-6884
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
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-67-A-0094-0013
International Business Machines Corporation30058
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Record Number:CaltechAUTHORS:20130717-141320580
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39422
Deposited By: Tony Diaz
Deposited On:20 Sep 2013 23:30
Last Modified:17 Nov 2022 22:28

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