Publication

Article Metrics

Citations


Online attention

Linear colossal magnetoresistance and magnetic textures in LaTiO3 thin films on SrTiO3

DOI: 10.1103/PhysRevB.108.245405 DOI Help

Authors: Teresa Tschirner (IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat) , Berengar Leikert (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Felix Kern (IFW Dresden) , Daniel Wolf (IFW Dresden) , Axel Lubk (IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; TU Dresden) , Martin Kamp (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Kirill Miller (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Fabian Hartmann (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Sven Höfling (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Judith Gabel (Diamond Light Source) , Matthias Schmitt (Diamond Light Source) , Martin Stuebinger (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Julia Küspert (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Tien-Lin Lee (Diamond Light Source) , Bernd Büchner (IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; TU Dresden) , Joseph Dufouleur (IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat) , Marc Gabay (Université Paris-Saclay, CNRS UMR 8502) , Michael Sing (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Ralph Claessen (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg) , Louis Veyrat (IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 108

State: Published (Approved)
Published: December 2023
Diamond Proposal Number(s): 21676

Abstract: Linear magnetoresistance (LMR) is of particular interest for memory, electronics, and sensing applications, especially when it does not saturate over a wide range of magnetic fields. Structural disorder, however, also tends to limit the mobility and hence the overall LMR amplitude. An alternative route to achieve large LMR is via nonstructural inhomogeneities which do not affect the zero field mobility, like magnetic domains. Here, we report a colossal positive linear magnetoresistance in La TiO 3 / Sr TiO 3 heterostructures, with amplitude up to 6500% at 9T at low temperature. The colossal amplitude of the LMR, one of the largest in oxide heterostructure, stems from the unusual combination of a very high heterostructure mobility, up to 40 000 cm 2 V − 1 s − 1 , and a very large coverage of low-mobility regions. Low-temperature Lorentz transmission electron microscopy measurements further reveals a striped magnetic structure at the sub- µ m scale in the La TiO 3 layer, compatible with in-plane spiral magnetism, with very high surface coverage. We propose that the low-mobility regions and striped magnetic regions are correlated, we model the increase in scattering induced by the magnetic texture, and we show that the non saturating LMR fits the Parish-Littlewood scenario. Our results provide a novel route for the engineering of large-LMR systems, using magnetic texture.

Journal Keywords: Colossal magnetoresistance; Electrical conductivity; Electrical properties; Magnetic texture; Magnetotransport; Transparent conducting oxides; Lorentz microscopy; Transmission electron microscopy

Subject Areas: Materials, Physics


Instruments: I09-Surface and Interface Structural Analysis

Added On: 11/12/2023 09:02

Discipline Tags:

Surfaces Physics Hard condensed matter - structures Magnetism Materials Science interfaces and thin films

Technical Tags:

Spectroscopy X-ray Photoelectron Spectroscopy (XPS)