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Title: Anomalous Hall effect in YIG|Pt bilayers

We measure the ordinary and the anomalous Hall effect in a set of yttrium iron garnet|platinum (YIG|Pt) bilayers via magnetization orientation dependent magnetoresistance experiments. Our data show that the presence of the ferrimagnetic insulator YIG leads to an anomalous Hall effect like voltage in Pt, which is sensitive to both Pt thickness and temperature. Interpretation of the experimental findings in terms of the spin Hall anomalous Hall effect indicates that the imaginary part of the spin mixing conductance G{sub i} plays a crucial role in YIG|Pt bilayers. In particular, our data suggest a sign change in G{sub i} between 10 K and 300 K. Additionally, we report a higher order Hall effect contribution, which appears in thin Pt films on YIG at low temperatures.
Authors:
;  [1] ;  [2] ; ;  [1] ; ;  [1] ;  [2] ;  [1] ;  [2] ;  [2]
  1. Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22398818
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; 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; ELECTRIC POTENTIAL; FERRITE GARNETS; FILMS; HALL EFFECT; IRON OXIDES; LAYERS; MAGNETIZATION; MAGNETORESISTANCE; ORIENTATION; PLATINUM; SPIN; TEMPERATURE DEPENDENCE; YTTRIUM; YTTRIUM COMPOUNDS