Single layer graphene Hall sensors for scanning Hall probe microscopy (SHPM) in 3-300 K temperature range

Sonusen S., KARCI Ö., DEDE M., Aksoy S., Oral A.

APPLIED SURFACE SCIENCE, vol.308, pp.414-418, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 308
  • Publication Date: 2014
  • Doi Number: 10.1016/j.apsusc.2014.04.191
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.414-418
  • Keywords: Scanning Hall probe microscopy, Graphene, Graphene Hall sensor, Magnetic imaging
  • Middle East Technical University Affiliated: Yes

Abstract

Graphene micro-Hall probes were developed for a scanning Hall probe microscope system and used for the direct magnetic imaging domains of demagnetized NdFeB permanent magnet for the first time. The Hall coefficient and minimum magnetic field resolution of graphene Hall probes at 1 kHz were found to be 0.18 Omega/G and 0.20 G/root Hz for a drive current of 3 mu A at room temperature in vacuum. The magnetic domains in NdFeB demagnetized magnet were observed at 300K, 126K and 3K successfully. (C) 2014 Elsevier B.V. All rights reserved.