Time and Temperature Stability of Magnetization - A Study onMagnetite 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 requrie a major increase in our                   knowledge of the effects of time and temperature on the magneti>zation          of pure m agnetite and titanomagnetite.  The PIs have                           d a materials synthesis technique, the glass-ceramic                            method, which produces uniform grains ranging in size from   50                 nm to 100 um in a state of low internal stress as seen from                     their magnetic hysteresis and thermoremance properties.  They                   study the effects of applied field, temperature and internal                    stress on the acquisition and stability of thermo-viscous                       magnetization.  The results will be specially relevant to test                  whether domain wall/stress interaction through "disaccommodation" or            "aftereffect" phenomenon is important for terrestrial samples                   and may lead to methods for removing undesirable but relatively                 stable viscous magnetization.  These studies will be comple>mentary to          those now  being carried out by Halgedahl and Moskowitz on the role of          domain wall generation and movement in viscous magnetization.
[{'FirstName': 'Horst', 'LastName': 'Worm', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Horst Worm', 'EmailAddress': None, 'NSF_ID': '000380904', 'StartDate': '07/01/1987', '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': '07/01/1987', '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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