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

Journal Article · Fri Aug 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4929634· OSTI ID:22494789

Löffler, J. F. ^[1]; Kind, J. ^[1]; Koulialias, D.; Weidler, P. G. ^[2]; Mensing, C. ^[3]

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1. Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich (Switzerland)
2. Institute of Functional Interfaces, Karlsruhe Institute of Technology, 76131 Karlsruhe (Germany)
3. Laboratory of Inorganic Chemistry, ETH Zurich, 8093 Zurich (Switzerland)

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.

• OSTI ID: 22494789
• Journal Information: Journal of Applied Physics, Vol. 118, Issue 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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