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Title: Strain-induced high-temperature perovskite ferromagnetic insulator

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [3];  [1];  [1];  [4];  [1];  [1];  [1];  [1];  [1];  [5];  [1];  [6];  [7];  [8]
  1. Univ. of Science and Technology of China, Anhui (People's Republic of China)
  2. Univ. of Science and Technology of China, Anhui (People's Republic of China); Chinese Academy of Sciences, Anhui (People's Republic of China)
  3. Univ. of Science and Technology of China, Anhui (People's Republic of China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Shaanxi Normal Univ., Shaanxi (People's Republic of China)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
  6. Wright-Patterson Air Force Base (AFB), Wright-Patterson AFB, OH (United States)
  7. US Air Force Academy, CO (United States)
  8. Univ. of Science and Technology of China, Anhui (People's Republic of China); Wright-Patterson Air Force Base (AFB), Wright-Patterson AFB, OH (United States); US Air Force Academy, CO (United States)

Ferromagnetic insulators are required for many new magnetic devices, such as dissipationless quantum-spintronic devices, magnetic tunneling junctions, etc. Ferromagnetic insulators with a high Curie temperature and a high-symmetry structure are critical integration with common single-crystalline oxide films or substrates. So far, the commonly used ferromagnetic insulators mostly possess low-symmetry structures associated with a poor growth quality and widespread properties. The few known high-symmetry materials either have extremely low Curie temperatures (≤16 K), or require chemical doping of an otherwise antiferromagnetic matrix. Here we present compelling evidence that the LaCoO3 single-crystalline thin film under tensile strain is a rare undoped perovskite ferromagnetic insulator with a remarkably high TC of up to 90 K. Both experiments and first-principles calculations demonstrate tensile-strain-induced ferromagnetism which does not exist in bulk LaCoO3. The ferromagnetism is strongest within a nearly stoichiometric structure, disappearing when the Co2+ defect concentration reaches about 10%. Furthermore, significant impact of the research includes demonstration of a strain-induced high-temperature ferromagnetic insulator, successful elevation of the transition over the liquid-nitrogen temperature, and high potential for integration into large-area device fabrication processes.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1465448
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 115, Issue 12; Related Information: © 2018 National Academy of Sciences. All rights reserved.; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 76 works
Citation information provided by
Web of Science

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Cited By (27)

Controlling the Magnetic Properties of LaMnO 3 /SrTiO 3 Heterostructures by Stoichiometry and Electronic Reconstruction: Atomic‐Scale Evidence journal May 2019
Interface Engineered Room‐Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films journal November 2019
Realization of Monophased LaCoO x Films with Ordered Oxygen Vacancies journal December 2019
Co 2+ substituted La 2 CuO 4 /LaCoO 3 perovskite nanocomposites: synthesis, properties and heterogeneous catalytic performance journal January 2018
Proximity-induced magnetism and an anomalous Hall effect in Bi 2 Se 3 /LaCoO 3 : a topological insulator/ferromagnetic insulator thin film heterostructure journal January 2018
Seeking large Seebeck effects in LaX(X = Mn and Co)O 3 /SrTiO 3 superlattices by exploiting high spin-polarized effects journal January 2019
Rare-earth-containing perovskite nanomaterials: design, synthesis, properties and applications journal January 2020
High throughput study on magnetic ground states with Hubbard U corrections in transition metal dihalide monolayers journal January 2020
High-temperature ferromagnetic insulating phase in strained La 0.8 Sr 0.2 MnO 3 thin films journal September 2019
Strain effects on conductivity and charge transport in La-doped BaTiO 3 thin films journal December 2019
Topotactic transition between perovskite and brownmillerite phases for epitaxial LaCoO 3− δ films and effects thus resulted journal February 2020
Weak ferromagnetic insulator with huge coercivity in monoclinic double perovskite La 2 CuIrO 6 journal July 2019
Hydrostatic pressure induced structural phase transition and mechanical properties of fluoroperovskite journal October 2019
( LaCo O 3 ) n / ( SrCo O 2.5 ) n superlattices: Tunable ferromagnetic insulator journal August 2019
Perpendicular magnetic anisotropy in L a 1 x S r x Co O 2.5 + δ / L a 2 / 3 S r 1 / 3 Mn O 3 / L a 1 x S r x Co O 2.5 + δ trilayers ( x = 0.05 0.5 ) journal September 2019
Low-energy orbital excitations in strained LaCoO 3 films journal October 2019
Exploring the structural, electronic, and magnetic properties of cation-ordered 3 d 5 d double-perovskite Bi 2 FeReO 6 and Bi 2 FeIrO 6 thin films from first principles journal December 2019
Exchange-biased nanocomposite ferromagnetic insulator journal January 2020
Self-consistent site-dependent DFT+ U study of stoichiometric and defective SrMnO 3 journal March 2019
Emergence of a Multiferroic Half-Metallic Phase in Bi 2 FeCrO 6 through Interplay of Hole Doping and Epitaxial Strain journal September 2019
Direct imaging revealing halved ferromagnetism in tensile-strained LaCo O 3 thin films journal July 2019
Maximization of ferromagnetism in LaCo O 3 films by competing symmetry journal November 2019
Interface Engineered Room-Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. text January 2020
Self-consistent site-dependent DFT+U study of stoichiometric and defective SrMnO₃ text January 2019
Interface Engineered Room-Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. text January 2019
Weak ferromagnetic insulator with huge coercivity in monoclinic double perovskite La2CuIrO6 text January 2019
Strain engineering of epitaxial oxide heterostructures beyond substrate limitations preprint January 2019

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