Large Room Temperature Magneto-Resistance in Magnetically Disordered Fe1.5Ti0.5O3-δ Thin Films
Abstract
Electronic transport properties of magnetically disordered R(-3)c phase Fe1.5Ti0.5O3-δ thin films epitaxially grown on Al2O3(0001) substrates have been studied. The measured magnetization in configurations with the magnetic field perpendicular and parallel to the film plane shows weak values of 0.1μB/formula compared to the theoretical value of 2μB/formula and a strong anisotropy with no saturation in perpendicular configuration. These properties are associated with the ato- mic scale disorder of Ti/Fe ions along c-axis. At zero-magnetic field and within the temperature range of 80 K to 400 K, the conduction mechanism appears to be Efros-Shklovskii variable range hopping with a carrier localization length of ξ0= 0.86nm. Magneto-resistance (MR) is positive in perpendicular configuration, while it is negative in parallel configuration, with significant values of MR = 27%- 37% at room temperature at 9 Tesla. Electron localization lengths were deduced from experiment for different external magnetic fields. The origin of magneto-resistance observed in experiment, is discussed.
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BibTeX
@article{chikoidze2026large,
title = {{Large Room Temperature Magneto-Resistance in Magnetically Disordered Fe1.5Ti0.5O3-δ Thin Films}},
author = {Ekaterine Chikoidze and Yves Dumont and Elena Popova and Niels Keller and Andrey Shumilin and Veniamin Kozub and Benedicte Warot-Fonrose},
journal = {World Journal of Condensed Matter Physics},
year = {2026},
month = aug,
doi = {10.4236/wjcmp.2014.44028},
url = {https://univ-lemans.hal.science/hal-05732906v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Large Room Temperature Magneto-Resistance in Magnetically Disordered Fe1.5Ti0.5O3-δ Thin Films
AU - Ekaterine Chikoidze
AU - Yves Dumont
AU - Elena Popova
AU - Niels Keller
AU - Andrey Shumilin
AU - Veniamin Kozub
AU - Benedicte Warot-Fonrose
PY - 2026
DA - 2026/08/31
JO - World Journal of Condensed Matter Physics
DO - 10.4236/wjcmp.2014.44028
UR - https://univ-lemans.hal.science/hal-05732906v1
AB - Electronic transport properties of magnetically disordered R(-3)c phase Fe1.5Ti0.5O3-δ thin films epitaxially grown on Al2O3(0001) substrates have been studied. The measured magnetization in configurations with the magnetic field perpendicular and parallel to the film plane shows weak values of 0.1μB/formula compared to the theoretical value of 2μB/formula and a strong anisotropy with no saturation in perpendicular configuration. These properties are associated with the ato- mic scale disorder of Ti/Fe ions along c-axis. At zero-magnetic field and within the temperature range of 80 K to 400 K, the conduction mechanism appears to be Efros-Shklovskii variable range hopping with a carrier localization length of ξ0= 0.86nm. Magneto-resistance (MR) is positive in perpendicular configuration, while it is negative in parallel configuration, with significant values of MR = 27%- 37% at room temperature at 9 Tesla. Electron localization lengths were deduced from experiment for different external magnetic fields. The origin of magneto-resistance observed in experiment, is discussed.
SN - 2160-6919
SN - 2160-6927
ER -