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Title: Giant spontaneous Hall effect in zero-moment Mn{sub 2}Ru{sub x}Ga

Spin-dependent transport properties of Mn{sub 2}Ru{sub x}Ga thin-films are studied as function of the Ru concentration and the substrate-induced strain. The large spontaneous Hall angle of 7.7% twenty times bigger than in other 3d metals is a signature of its half-metallicity. The compensation temperature where the magnetization of the two inequivalent antiferromagnetically coupled Mn sublattices cancel can be tuned by varying x or the biaxial strain. This zero-moment half metal is free from demagnetizing forces and creates no stray field, effectively removing two obstacles to integrating magnetic elements in densely packed, nanometer-scale memory elements, and millimeter-wave generators.
Authors:
; ; ; ; ; ;  [1]
  1. CRANN, AMBER and School of Physics, Trinity College, Dublin 2 (Ireland)
Publication Date:
OSTI Identifier:
22398775
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 12; 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; ANTIFERROMAGNETISM; CONCENTRATION RATIO; GALLIUM; HALL EFFECT; INTERMETALLIC COMPOUNDS; MAGNETIZATION; MANGANESE; METALLICITY; RUTHENIUM; SPIN; STRAINS; SUBSTRATES; THIN FILMS