journal article·2018-05-01Open access

Synthesis and electronic properties of Fe2TiO5 epitaxial thin films

Motoki Osada, Kazunori Nishio, Harold Y. Hwang, Yasuyuki Hikita

APL Materials· Volume 6· Issue 5

Abstract

We investigate the growth phase diagram of pseudobrookite Fe2TiO5 epitaxial thin films on LaAlO3 (001) substrates using pulsed laser deposition. Control of the oxygen partial pressure and temperature during deposition enabled selective stabilization of (100)- and (230)-oriented films. In this regime, we find an optical gap of 2.1 eV and room temperature resistivity in the range of 20–80 Ω cm, which are significantly lower than α-Fe2O3, making Fe2TiO5 potentially an ideal inexpensive visible-light harvesting semiconductor. These results provide a basis to incorporate Fe2TiO5 in oxide heterostructures for photocatalytic and photoelectrochemical applications.
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Research context

OpenAlex topics: Iron oxide chemistry and applications · Multiferroics and related materials · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, Stanford University 1 , Stanford, California 94305, USA

Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University 2 , Stanford, California 94305, USA

SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences 3 , Menlo Park, California 94025, USA

Department of Chemical Science and Engineering, Tokyo Institute of Technology 4 , Ookayama Meguro-ku, Tokyo 152-8550, Japan

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