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Title: Scanning SQUID microscope differentiation of ferromagnetic steelphases

Abstract

We have studies the remanent magnetization of ferromagneticsteel with five different microstructures using a microscope based on ahigh-transition-temperature dc Superconducting QUantum InterferenceDevice (SQUID). We prepared the samples using different heat treatments,beginning with the same material composition. We magnetized each samplein turn in a magnetic field of 50 mT, and studied the remanentmagnetization by scanning the sample over the SQUID using atwo-dimensional (2D) translation stage with a range of 50 mm X 50 mm.With a sample-to-SQUID separation of 400-500(mu)m, this procedure yieldeda 2D magnetic field image produced by the local remanent magnetization ofthe sample. In addition, we have obtained microstructural informationusing optical imaging, allowing us to correlate the magnetic images withthe underlying microstructure.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic EnergySciences. Division of Materials Sciences
OSTI Identifier:
894383
Report Number(s):
LBNL-44248
R&D Project: 512105
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 48; Journal Issue: 10; Related Information: Journal Publication Date: 06/14/2000
Country of Publication:
United States
Language:
English
Subject:
non-destructive evaluation steels magnetic methods SQUIDoptical microscopy

Citation Formats

Shaw, T.J., Chan, J.W., Kang, S.-H., McDermott, R., Morris Jr.,J.W., and Clarke, John. Scanning SQUID microscope differentiation of ferromagnetic steelphases. United States: N. p., 1999. Web.
Shaw, T.J., Chan, J.W., Kang, S.-H., McDermott, R., Morris Jr.,J.W., & Clarke, John. Scanning SQUID microscope differentiation of ferromagnetic steelphases. United States.
Shaw, T.J., Chan, J.W., Kang, S.-H., McDermott, R., Morris Jr.,J.W., and Clarke, John. Wed . "Scanning SQUID microscope differentiation of ferromagnetic steelphases". United States.
@article{osti_894383,
title = {Scanning SQUID microscope differentiation of ferromagnetic steelphases},
author = {Shaw, T.J. and Chan, J.W. and Kang, S.-H. and McDermott, R. and Morris Jr.,J.W. and Clarke, John},
abstractNote = {We have studies the remanent magnetization of ferromagneticsteel with five different microstructures using a microscope based on ahigh-transition-temperature dc Superconducting QUantum InterferenceDevice (SQUID). We prepared the samples using different heat treatments,beginning with the same material composition. We magnetized each samplein turn in a magnetic field of 50 mT, and studied the remanentmagnetization by scanning the sample over the SQUID using atwo-dimensional (2D) translation stage with a range of 50 mm X 50 mm.With a sample-to-SQUID separation of 400-500(mu)m, this procedure yieldeda 2D magnetic field image produced by the local remanent magnetization ofthe sample. In addition, we have obtained microstructural informationusing optical imaging, allowing us to correlate the magnetic images withthe underlying microstructure.},
doi = {},
journal = {Acta Materialia},
number = 10,
volume = 48,
place = {United States},
year = {1999},
month = {9}
}