skip to main content

Title: An interchangeable scanning Hall probe/scanning SQUID microscope

We have constructed a scanning probe microscope for magnetic imaging, which can function as a scanning Hall probe microscope (SHPM) and as a scanning SQUID microscope (SSM). The scanning scheme, applicable to SHPM and SSM, consists of a mechanical positioning (sub) micron-XY stage and a flexible direct contact to the sample without a feedback control system for the Z-axis. With the interchangeable capability of operating two distinct scanning modes, our microscope can incorporate the advantageous functionalities of the SHPM and SSM with large scan range up to millimeter, high spatial resolution (⩽4 μm), and high field sensitivity in a wide range of temperature (4.2 K-300 K) and magnetic field (10{sup −7} T-1 T). To demonstrate the capabilities of the system, we present magnetic images scanned with SHPM and SSM, including a RbFeB magnet and a nickel grid pattern at room temperature, surface magnetic domain structures of a La{sub 2/3}Ca{sub 1/3}MnO{sub 3} thin film at 77 K, and superconducting vortices in a striped niobium film at 4.2 K.
Authors:
; ;  [1] ; ;  [2] ;  [3] ; ;  [1] ;  [4]
  1. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. Institute of Astronomy and Astrophysics, Academia Sinica, Taipei 10617, Taiwan (China)
  3. Department of Physics, Tamkang University, Tamsui Dist., New Taipei City 25137, Taiwan (China)
  4. (China)
Publication Date:
OSTI Identifier:
22314424
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CONTROL SYSTEMS; DOMAIN STRUCTURE; IMAGES; MAGNETIC FIELDS; MAGNETS; MANGANESE OXIDES; MICROSCOPES; NICKEL; NIOBIUM; POSITIONING; SENSITIVITY; SPATIAL RESOLUTION; SQUID DEVICES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS