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Direct observation of proximity-induced magnetism and spin reorientation in topological insulator on a ferrimagnetic oxide

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5083931· OSTI ID:1566660
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [4];  [4];  [2];  [5]
  1. National Taiwan Univ., Taipei (Taiwan)
  2. Univ. of California, Riverside, CA (United States)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  5. National Taiwan Univ., Taipei (Taiwan); Academia Sinica, Taipei (Taiwan)
The quantum anomalous Hall effect (QAHE) in a magnetic topological insulator system without the need of an external magnetic field becomes of great interest because of its dissipationless spin currents. The proximity effect via a magnetic adlayer is a promising strategy to bring magnetism into a topological insulator (TI) due to its boosted Curie temperature for a realistic application. In this work, a proximity-induced magnetism above 90 K in a TI, (Bi0.25Sb0.75)2Te3, on a ferrimagnetic adlayer with perpendicular magnetic anisotropy, thulium-iron-garnet (TIG), was evidenced directly by using magnetic circular dichroism. A competition between exchange couplings with different sublattice-sites was further revealed element-specifically in a temperature-driven spin-reorientation of TI, bringing an issue on magnetic inhomogeneity at the interface, which might cause difficulties in obtaining QAHE in such a TI/TIG bilayer system. Our results prove directly the robust magnetism of TI above liquid nitrogen temperatures and also give a deep insight into the mechanism of interfacial coupling in the proximity effect for the bilayer of TI and magnetic oxide, which could be essential for the design of a system with QAHE.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE SC Office of Basic Energy Sciences (SC-22)
Grant/Contract Number:
SC0012670
OSTI ID:
1566660
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 8 Vol. 114; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (32)

Tm 3 Fe 5 O 12 /Pt Heterostructures with Perpendicular Magnetic Anisotropy for Spintronic Applications journal December 2016
Magnetization measurements on some rare-earth iron garnets journal October 1995
Magnetization measurements on some rare-earth iron garnets journal September 1995
XMCD study of electronic states in rare-earth iron garnet journal May 2004
X-ray magnetic circular dichroism study of Dy-doped Bi2Te3 topological insulator thin films journal January 2017
Independent Tuning of Electronic Properties and Induced Ferromagnetism in Topological Insulators with Heterostructure Approach journal August 2015
Selective Tuning of Gilbert Damping in Spin-Valve Trilayer by Insertion of Rare-Earth Nanolayers journal July 2015
Proximity Induced High-Temperature Magnetic Order in Topological Insulator - Ferrimagnetic Insulator Heterostructure journal May 2014
Carrier-mediated ferromagnetism in the magnetic topological insulator Cr-doped (Sb,Bi)2Te3 journal November 2015
Direct evidence of ferromagnetism in a quantum anomalous Hall system journal May 2018
Magneto-optical design of anomalous Nernst thermopile journal May 2021
Observation of an atomic exchange bias effect in DyCo4 film journal December 2015
Recent advances in x-ray absorption spectroscopy journal October 2004
Proximity effects and exchange bias in Co/MnF 2 (111) heterostructures studied by x-ray magnetic circular dichroism journal December 2012
Quantum anomalous Hall effect in time-reversal-symmetry breaking topological insulators journal March 2016
Magnetic Study of the Heavier Rare-Earth Iron Garnets journal February 1965
Magnetic circular dichroism in the soft-x-ray absorption spectra of Mn-based magnetic intermetallic compounds journal September 1997
Role of critical spin fluctuations in ultrafast demagnetization of transition-metal rare-earth alloys journal June 2013
X-ray magnetic circular dichroism experiments and theory of transuranium Laves phase compounds journal July 2013
Anomalous Hall hysteresis in T m 3 F e 5 O 12 / Pt with strain-induced perpendicular magnetic anisotropy journal October 2016
Magnetic proximity coupling to Cr-doped Sb 2 Te 3 thin films journal June 2017
Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe / ( Ga , Mn ) As Interfaces journal December 2008
Sublattice Magnetic Relaxation in Rare Earth Iron Garnets journal July 2013
Above 400-K robust perpendicular ferromagnetic phase in a topological insulator journal June 2017
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator journal March 2013
Stress-Induced Perpendicular Magnetization in Epitaxial Iron Garnet Thin Films journal September 2012
X-Ray Detected Magnetic Resonance: A Unique Probe of the Precession Dynamics of Orbital Magnetization Components journal December 2011
Independent tuning of electronic properties and induced ferromagnetism in topological insulators with heterostructure approach text January 2015
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator text January 2016
Above 400 K Robust Perpendicular Ferromagnetic Phase in a Topological Insulator text January 2017
Direct evidence of ferromagnetism in a quantum anomalous Hall system text January 2018
Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/(Ga,Mn)As Interfaces text January 2008

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