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