Hysteretic Magnetoresistance in a Non-Magnetic SrSnO3 Film via Thermal Coupling to Dynamic Substrate Behavior

Laxman Raju Thoutam, Tristan K. Truttmann, Anil Kumar Rajapitamahuni, Bharat Jalan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Hysteretic magnetoresistance (MR) is often used as a signature of ferromagnetism in conducting oxide films and heterostructures. Here, magnetotransport is investigated in a nonmagnetic La-doped SrSnO 3 film. A 12 nm La:SrSnO 3/2 nm SrSnO 3/GdScO 3 (110) film with insulating behavior exhibited a robust hysteresis loop in the MR at T < 5 K accompanied by an anomaly at ∼±3 T at T < 2.5 K. Furthermore, MR with the field in-plane yielded a value exceeding 100% at 1.8 K. Using detailed temperature-, angle- and magnetic field-dependent resistance measurements, we illustrate the origin of hysteresis is not due to magnetism in the film but rather is associated with the magnetocaloric effect of the substrate. Given GdScO 3 and similar substrates are commonly used, this work highlights the importance of thermal coupling to processes in the substrates which must be carefully accounted for in the data interpretation for heterostructures utilizing these substrates.

Original languageEnglish (US)
Pages (from-to)10006-10011
Number of pages6
JournalNano letters
Volume21
Issue number23
DOIs
StatePublished - Dec 8 2021

Bibliographical note

Funding Information:
The authors acknowledge Fengdeng Liu for the illustration of the Dynacool rotator puck. This work was supported primarily by the National Science Foundation (NSF) through the University of Minnesota MRSEC under Award Number DMR-2011401. Part of this work was supported through the Air Force Office of Scientific Research (AFOSR) through Grant No. FA9550-19-1-0245 and FA9550-21-1-0025 and through NSF DMR-1741801. Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation (NSF) through the National Nano Coordinated Infrastructure Network (NNCI) under Award Number ECCS-1542202. Part of this work was also carried out in the College of Science and Engineering Characterization Facility, University of Minnesota, which has received capital equipment funding from the NSF through the UMN MRSEC program.

Publisher Copyright:
© 2021 American Chemical Society.

How much support was provided by MRSEC?

  • Primary

PubMed: MeSH publication types

  • Journal Article

Fingerprint

Dive into the research topics of 'Hysteretic Magnetoresistance in a Non-Magnetic SrSnO3 Film via Thermal Coupling to Dynamic Substrate Behavior'. Together they form a unique fingerprint.

Cite this