Time and Temperature Stability of Magnetization- a Study on Magnetite and Titanomagnetite Prepared by the Glass-Ceramic Method
{'Code': '06030204', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Michael A. Mayhew', 'PO_EMAI': None, 'PO_PHON': None}
At the Asilomar Workshop on Rock Magnetism (September 16-19,               1986) it was unanimously agreed that the next generation of                     paleomagnetic problems which impact on geomagnetic field                        generation and reversal, tectonics of continental margins and                   Precambrian continental drift require a major increase in our                   knowledge of the effects of time and temperature on the                         magnetization of pure magnetite and titanomagnetite.  A materials               synthesis technique, the glass-ceramic method, which produces                   well dispersed single crystals ranging in size from 50 nm to 100                um in a non-magnetic matrix material has been developed.  These                 samples (and other newly synthesized ones) will be used to study                the effects of applied field, temperature and internal stress on                the acquisition and stability of thermo-viscous magnetization.                  The experiments will reveal whether domain wall/stress                          interaction through "disacommodation" or "aftereffect" phenomenon               is important for multidomain samples whose thermomagnetic                       properties we have shown to be not explicable with existing                     theories.  The results will also be relevant to best and possibly               improve thermal paleointensity methods, presently a matter of                   considerable controversy.
[{'FirstName': 'Horst', 'LastName': 'Worm', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Horst Worm', 'EmailAddress': None, 'NSF_ID': '000380904', 'StartDate': '10/15/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Subir', 'LastName': 'Banerjee', 'PI_MID_INIT': 'K', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Subir K Banerjee', 'EmailAddress': 'banerjee@umn.edu', 'NSF_ID': '000467452', 'StartDate': '10/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
{'Name': 'University of Minnesota-Twin Cities', 'CityName': 'MINNEAPOLIS', 'ZipCode': '554552009', 'PhoneNumber': '6126245599', 'StreetAddress': '200 OAK ST SE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Minnesota', 'StateCode': 'MN', 'CONGRESSDISTRICT': '05', 'CONGRESS_DISTRICT_ORG': 'MN05', 'ORG_UEI_NUM': 'KABJZBBJ4B54', 'ORG_LGL_BUS_NAME': 'REGENTS OF THE UNIVERSITY OF MINNESOTA', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1574', 'Text': 'Geophysics'}
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