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Title: Scanning Hall probe microscopy of superconductors and magnetic materials

Abstract

We describe results from a scanning Hall probe microscope operating in a broad temperature range, 4{endash}300 K. A submicron Hall probe manufactured in a GaAs/AlGaAs two-dimensional electron gas is scanned over the sample to measure the surface magnetic fields using conventional scanning tunneling microscopy positioning techniques. The magnetic field structure of the sample together with the topography can be obtained simultaneously. The technique is noninvasive with an extremely low self-field of {lt}10{sup {minus}2} G and yields a quantitative measurement of the surface magnetic field in contrast to magnetic force microscopy. In addition the microscope has an outstanding magnetic field resolution ({approximately}1.1{times}10{sup {minus}3} G/{radical}Hz at 77 K) and high spatial resolution, {approximately}0.85 {mu}m. Images of individual vortices in a high-{ital T}{sub {ital c}} Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin film at low temperatures and magnetic domains in an Fe-garnet crystal at room temperature are presented. {copyright} {ital 1996 American Vacuum Society}

Authors:
;  [1];  [2]
  1. School of Physics, University of Bath, Bath BA2 7AY (England)
  2. Department of Physics, University of Nottingham, Nottingham NG7 2RD (England)
Publication Date:
OSTI Identifier:
280145
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena
Additional Journal Information:
Journal Volume: 14; Journal Issue: 2; Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNETIC MATERIALS; MAGNETIZATION; HIGH-TC SUPERCONDUCTORS; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; SUPERCONDUCTING FILMS; HALL EFFECT; DOMAIN STRUCTURE; MICROSCOPY; PROBES; GALLIUM ARSENIDES; ALUMINIUM ARSENIDES

Citation Formats

Oral, A, Bending, S J, and Henini, M. Scanning Hall probe microscopy of superconductors and magnetic materials. United States: N. p., 1996. Web. doi:10.1116/1.588514.
Oral, A, Bending, S J, & Henini, M. Scanning Hall probe microscopy of superconductors and magnetic materials. United States. https://doi.org/10.1116/1.588514
Oral, A, Bending, S J, and Henini, M. 1996. "Scanning Hall probe microscopy of superconductors and magnetic materials". United States. https://doi.org/10.1116/1.588514.
@article{osti_280145,
title = {Scanning Hall probe microscopy of superconductors and magnetic materials},
author = {Oral, A and Bending, S J and Henini, M},
abstractNote = {We describe results from a scanning Hall probe microscope operating in a broad temperature range, 4{endash}300 K. A submicron Hall probe manufactured in a GaAs/AlGaAs two-dimensional electron gas is scanned over the sample to measure the surface magnetic fields using conventional scanning tunneling microscopy positioning techniques. The magnetic field structure of the sample together with the topography can be obtained simultaneously. The technique is noninvasive with an extremely low self-field of {lt}10{sup {minus}2} G and yields a quantitative measurement of the surface magnetic field in contrast to magnetic force microscopy. In addition the microscope has an outstanding magnetic field resolution ({approximately}1.1{times}10{sup {minus}3} G/{radical}Hz at 77 K) and high spatial resolution, {approximately}0.85 {mu}m. Images of individual vortices in a high-{ital T}{sub {ital c}} Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin film at low temperatures and magnetic domains in an Fe-garnet crystal at room temperature are presented. {copyright} {ital 1996 American Vacuum Society}},
doi = {10.1116/1.588514},
url = {https://www.osti.gov/biblio/280145}, journal = {Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena},
number = 2,
volume = 14,
place = {United States},
year = {1996},
month = {3}
}