Abstract
Employing a new experimental technique to measure magnetoelectric response functions, we have measured the magnetoelectric effect in composite films of nanogranular metallic iron in anatase titanium dioxide at temperatures below 50 K. A magnetoelectric resistance is defined as the ratio of a transverse voltage to bias current as a function of magnetic field. In contrast to the anomalous Hall resistance measured above 50 K, the magnetoelectric resistance below 50 K is significantly larger and exhibits an even symmetry with respect to magnetic field reversal H ->-H. The composite films are unique in terms of showing magnetoelectric effects at low temperatures, < 50 K, and anomalous Hall effects at high temperatures, >50 K.
Keywords
magnetoelectric response functions, magnetoelectric resistance, nanogranular Fe/TiO(2₋δ) films, metallic iron in anatase titanium dioxide, composite films
Subject Categories
Magnetic fields
Disciplines
Electromagnetics and photonics
Publisher
American Institute of Physics
Publication Date
1-28-2008
Rights Information
Copyright 2008 American Institute of Physics.
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Yoon, S. D.; Vittoria, C.; Srivastava, Y. N.; Widom, A.; and Harris, V. G., "Magnetoelectric effects in composite of nanogranular Fe/TiO(2₋δ) films" (2008). Electrical and Computer Engineering Faculty Publications. Paper 78. http://hdl.handle.net/2047/d20002249
Figure 1
magnetoelectric_effects_fig2.zip (37 kB)
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Additional Files
magnetoelectric_effects_fig1.zip (316 kB)Figure 1
magnetoelectric_effects_fig2.zip (37 kB)
Figure 2
magnetoelectric_effects_fig3.zip (52 kB)
Figure 3
Notes
Originally published in Applied Physics Letters 92, 042508 (2008). DOI:10.1063/1.2838757 (http://dx.doi.org/10.1063/1.2838757).