Experimental Studies of Condensed Magnetic Systems
{'Code': '03070003', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'DMR', 'LongName': 'Division Of Materials Research'}}
{'SignBlockName': 'Wendy W. Fuller-Mora', 'PO_EMAI': None, 'PO_PHON': None}
An extensive investigation is proposed of the recently uncovered                unusual dynamic critical behavior in random exchange (REIM) and                 random field (RFIM) Ising model terms, using ac susceptibility                  X'(w) and neutron spin echo techniques.  Both linear Xl(w) and                  nonlinear X'nl (w) will be investigated as a function of w.  More               precise values for the static critical exponents of the RFIM will               be sought from neutron scattering experiments.  Novel,                          magnetically dense, RFIM systems will be fabricated and probed                  in the hope of finding an example of pure Ising to RFIM crossover               behavior, using birefringence and capacitance techniques.  A new                optical absorption method will be used to better understand the                 nature of the domain structure of the nonequilibrium, field-                    cooled RFIM state.  The crossover form REIM/RFIM to Ising spin-                 glass behavior will be examined near the percolation threshold in               the ideal Ising system ironxzinc1-xfluorine2.  Lastly, they will                continue the preparation and study of epitaxed antiferromagnetic                insulators and superlattices of iron fluorine2/zinc fluorine2,                  manganese fluorine2/zinc fluorine2 and iron fluorine2/cobalt                    fluorine2 using AFMR, interdigital capacitance, FTIR and optical                spectroscopy and neutron scattering techniques.  They hope to                   observe standing spin wave and new instability modes,                           dimensionality crossover, folding of the Brillouin Zone and                     modification of the magnon density of states.  These combined                   studies should provide valuable insights in areas at the                        forefront of research in magnetic phenomena.
{'FirstName': 'Vincent', 'LastName': 'Jaccarino', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Vincent Jaccarino', 'EmailAddress': None, 'NSF_ID': '000157825', 'StartDate': '01/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of California-Santa Barbara', 'CityName': 'SANTA BARBARA', 'ZipCode': '931060001', 'PhoneNumber': '8058934188', 'StreetAddress': '3227 CHEADLE HALL', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '24', 'CONGRESS_DISTRICT_ORG': 'CA24', 'ORG_UEI_NUM': 'G9QBQDH39DF4', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF CALIFORNIA, SANTA BARBARA', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '176100', 'Text': 'SOLID STATE PHYSICS'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8815560.xml'}