Magnetic ordering temperatures at oxide interface LaAlO$_3$/SrTiO$_3$

ORAL

Abstract

A number of recent experiments demonstrate the existence of magnetic ordering at the conductive oxide interface LaAlO$_{3}$/SrTiO$_{3}$ (LAO/STO). Understanding the origin of this magnetism requires determination of the magnetic state at elevated temperature. In this study we carried out torque magnetometry measurements to track the magnetic transition temperatures in the interface samples with different LAO thickness. The magnetic ordering temperature is found to vary greatly as the thickness of LAO changes. . Our results suggest that the growth condition such as LAO thickness affects the magnetic coupling of the interface magnetic moments.

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Authors

  • Tomoya Asaba

    • Univ of Michigan - Ann Arbor
    • Randall Laboratory of Physics, University of Michigan
    • University of Michigan, Ann Arbor

  • Gang Li

    • Univ of Michigan - Ann Arbor
    • University of Michigan
    • Univ. of Michigan
    • Randall Laboratory of Physics, University of Michigan
    • Dept. of Physics, University of Michigan
    • University of Michigan, Ann Arbor

  • Benjamin Lawson

    • Univ of Michigan - Ann Arbor
    • Randall Laboratory of Physics, University of Michigan
    • University of Michigan, Ann Arbor

  • Fan Yu

    • Univ of Michigan - Ann Arbor
    • Randall Laboratory of Physics, University of Michigan
    • University of Michigan, Ann Arbor

  • Ziji Xiang

    • Univ of Michigan - Ann Arbor
    • Randall Laboratory of Physics, University of Michigan

  • Colin Tinsman

    • Univ of Michigan - Ann Arbor
    • University of Michigan
    • Randall Laboratory of Physics, University of Michigan

  • H.Y. Hwang

    • Stanford University
    • Geballe Laboratory for Advanced Materials \& Stanford Institute for Materials and Energy Sciences, Stanford University
    • GLAM, Stanford University

  • Jochen Mannhart

    • Max Planck Institute for Solid State Research

  • Lu Li

    • Univ of Michigan - Ann Arbor
    • University of Michigan
    • Randall Laboratory of Physics, University of Michigan
    • Dept. of Physics, University of Michigan
    • University of Michigan, Ann Arbor