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Title: Magneto-electronic coupling in modulated defect-structures of natural Fe{sub 1−x}S

We provide compelling experimental evidence that the low-temperature transition in natural non-stoichiometric Fe{sub 7}S{sub 8}, a major magnetic remanence carrier in the Earth's crust and in extraterrestrial materials, is a phenomenon caused by magnetic coupling between epitaxially intergrown superstructures. The two superstructures differ in their defect distribution, and consequently in their magnetic anisotropy. At T < 30 K, the magnetic moments of the superstructures become strongly coupled, resulting in a 12-fold anisotropy symmetry, which is reflected in the anisotropic magneto-resistance.
Authors:
;  [1] ;  [1] ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich (Switzerland)
  2. (Switzerland)
  3. Institute of Geophysics, Department of Earth Sciences, ETH Zurich, 8092 Zurich (Switzerland)
  4. Institute of Functional Interfaces, Karlsruhe Institute of Technology, 76131 Karlsruhe (Germany)
  5. Laboratory of Inorganic Chemistry, ETH Zurich, 8093 Zurich (Switzerland)
Publication Date:
OSTI Identifier:
22494789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; CARRIERS; DEFECTS; EARTH CRUST; EPITAXY; IRON COMPOUNDS; MAGNETIC MOMENTS; MAGNETORESISTANCE; TEMPERATURE RANGE 0065-0273 K