Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering

Mehta, Virat; Biskup, Nevenko; Arenholz, E; Varela del Arco, Maria; Suzuki, Yuri

doi:10.1103/PhysRevB.91.144418

Title: Long Range Ferromagnetic Order in LaCoO_3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering

Abstract

We demonstrate that a combination of electronic structure modification and oxygen vacancy ordering can stabilize a long-range ferromagnetic ground state in epitaxial LaCoO₃ thin films. Highest saturation magnetization values are found in the thin films in tension on SrTiO₃ and (La,Sr)(Al,Ta)O₃ substrates and the lowest values are found in thin films in compression on LaAlO₃. Electron microscopy reveals oxygen vacancy ordering to varying degrees in all samples, although samples with the highest magnetization are the most defective. Element-specific x-ray absorption techniques reveal the presence of high spin Co²⁺ and Co³⁺ as well as low spin Co³⁺ in different proportions depending on the strain state. The interactions among the high spin Co ions and the oxygen vacancy superstructure are correlated with the stabilization of the long-range ferromagnetic order.

Authors:

Mehta, Virat ^[1]; Biskup, Nevenko ^[2]; Arenholz, E ^[3]; Varela del Arco, Maria ^[2]; Suzuki, Yuri ^[4]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States);Univ. Complutense Madrid (Spain)
Univ. of California, Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Stanford Univ., CA (United States)

Publication Date:: Thu Apr 23 00:00:00 EDT 2015

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1222548

Alternate Identifier(s):: OSTI ID: 1178590

Grant/Contract Number:: AC05-00OR22725; AC02-05CH11231; DESC0008505

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 91; Journal Issue: 14; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats


                    Mehta, Virat, Biskup, Nevenko, Arenholz, E, Varela del Arco, Maria, and Suzuki, Yuri. Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevB.91.144418.

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                    Mehta, Virat, Biskup, Nevenko, Arenholz, E, Varela del Arco, Maria, & Suzuki, Yuri. Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering.  United States.  https://doi.org/10.1103/PhysRevB.91.144418

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                    Mehta, Virat, Biskup, Nevenko, Arenholz, E, Varela del Arco, Maria, and Suzuki, Yuri. Thu .  
"Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering".  United States.  https://doi.org/10.1103/PhysRevB.91.144418.  https://www.osti.gov/servlets/purl/1222548.

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@article{osti_1222548,

  title        = {Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering},

  author       = {Mehta, Virat and Biskup, Nevenko and Arenholz, E and Varela del Arco, Maria and Suzuki, Yuri},

  abstractNote = {We demonstrate that a combination of electronic structure modification and oxygen vacancy ordering can stabilize a long-range ferromagnetic ground state in epitaxial LaCoO3 thin films. Highest saturation magnetization values are found in the thin films in tension on SrTiO3 and (La,Sr)(Al,Ta)O3 substrates and the lowest values are found in thin films in compression on LaAlO3. Electron microscopy reveals oxygen vacancy ordering to varying degrees in all samples, although samples with the highest magnetization are the most defective. Element-specific x-ray absorption techniques reveal the presence of high spin Co2+ and Co3+ as well as low spin Co3+ in different proportions depending on the strain state. The interactions among the high spin Co ions and the oxygen vacancy superstructure are correlated with the stabilization of the long-range ferromagnetic order.},

  doi          = {10.1103/PhysRevB.91.144418},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 14,

  volume       = 91,

  place        = {United States},

  year         = {Thu Apr 23 00:00:00 EDT 2015},

  month        = {Thu Apr 23 00:00:00 EDT 2015}

}

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Title: Long Range Ferromagnetic Order in LaCoO3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering

Abstract

Citation Formats

Structural details and magnetic order of La 1 − x Sr x CoO 3 ( x <~ 0 . 3 ) journal, January 1999

Lattice structure and magnetization of LaCoO3 thin films journal, June 2010

Strain-driven magnetism in LaCoO 3 thin films journal, January 2009

Spin State Transition in LaCoO 3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism journal, October 2006

Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La 0.5 Sr 0.5 CoO 3-δ thin films journal, July 2013

Suppression of the ferromagnetic state in LaCoO 3 films by rhombohedral distortion journal, January 2009

Valence, spin, and orbital state of Co ions in one-dimensional Ca 3 Co 2 O 6 : An x-ray absorption and magnetic circular dichroism study journal, December 2006

First-Order Localized-Electron ⇆ Collective-Electron Transition in LaCo O 3 journal, March 1967

Ferromagnetism enhanced by structural relaxation of biaxially compressed LaCoO 3 films journal, April 2011

Strain-Induced Ferromagnetism in Antiferromagnetic LuMnO 3 Thin Films journal, July 2013

Different Look at the Spin State of Co 3 + Ions in a CoO 5 Pyramidal Coordination journal, May 2004

X-ray absorption and magnetic circular dichroism of LaCoO 3 , La 0.7 Ce 0.3 CoO 3 , and La 0.7 Sr 0.3 CoO 3 films: Evidence for cobalt-valence-dependent magnetism journal, November 2010

Insulating Ferromagnetic LaCoO 3 − δ Films: A Phase Induced by Ordering of Oxygen Vacancies journal, February 2014

The oxygen vacancy effect on the magnetic property of the LaMnO 3−δ thin films journal, March 2013

Ferrimagnetism in PrCoO 3 epitaxial films journal, January 2013

Monoclinic Ferroelastic Domains in LaCoO3-Based Perovskites journal, December 2007

Reversible strain effect on the magnetization of LaCoO 3 films journal, March 2009

TEM observations of rhombohedral and monoclinic domains in LaCoO 3 -based ceramics journal, March 2008

Strain-driven spin-state transition and superexchange interaction in LaCoO 3 : A b initio study journal, July 2012

Tuning the magnetic properties of La Co O 3 thin films by epitaxial strain journal, January 2008

Microscopic evidence of a strain-enhanced ferromagnetic state in LaCoO3 thin films journal, August 2009

Impact of stress on oxygen vacancy ordering in epitaxial (La0.5Sr0.5)CoO3−∂ thin films journal, May 2003

Ferromagnetic insulating state in tensile-strained LaCoO 3 thin films from LDA + U calculations journal, April 2012

Ferromagnetism in La Co O 3 journal, July 2004

Oxygen vacancy ordering in epitaxial La0.5Sr0.5CoO3−∂ thin films on (001) LaAlO3 journal, October 2001

Structural effects on the spin-state transition in epitaxially strained LaCoO 3 films journal, February 2009

Microstructure of epitaxial La 0.5 Sr 0.5 CoO 3 /ferroelectric Pb 0.9 La 0.1 (Zr 0.2 Ti 0.8 ) 0.975 O 3 /La 0.5 Sr 0.5 CoO 3 heterostructures on LaAlO 3 journal, September 1993

Controlling Orbital Moment and Spin Orientation in CoO Layers by Strain journal, October 2005

Strain-Induced Spin States in Atomically Ordered Cobaltites journal, January 2012

Epitaxial La0.5Sr0.5CoO3 thin films: Structure, magnetism, and transport journal, July 2008

Structural and electronic properties of oxygen vacancies in cubic and antiferrodistortive phases of SrTiO 3 journal, May 2004

Ferromagnetic spin-correlations in strained LaCoO3 thin films journal, November 2008

Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level journal, August 2012

Lattice structure and magnetization of LaCoO3 thin films text, January 2010

Strain-induced ferromagnetism in antiferromagnetic LuMnO3 thin films text, January 2013

Controlling orbital moment and spin orientation in CoO layers by strain text, January 2005

Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO 3−δ films journal, August 2016

Atomic-resolution in-situ cooling study of oxygen vacancy ordering in La 0.5 Sr 0.5 CoO 3−δ thin films journal, June 2019

Strain-induced high-temperature perovskite ferromagnetic insulator journal, March 2018

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Low-energy orbital excitations in strained LaCoO 3 films journal, October 2019

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Title: Long Range Ferromagnetic Order in LaCoO_3-δ epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering

Structural details and magnetic order of ${La}_{1 - x} {Sr}_{x} {CoO}_{3}$ $(x <~ 0.3)$
journal, January 1999

Lattice structure and magnetization of LaCoO3 thin films
journal, June 2010

Strain-driven magnetism in ${LaCoO}_{3}$ thin films
journal, January 2009

Spin State Transition in ${LaCoO}_{3}$ Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
journal, October 2006

Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La _0.5 Sr _0.5 CoO _3-δ thin films
journal, July 2013

Suppression of the ferromagnetic state in ${LaCoO}_{3}$ films by rhombohedral distortion
journal, January 2009

Valence, spin, and orbital state of Co ions in one-dimensional ${Ca}_{3} {Co}_{2} O_{6}$ : An x-ray absorption and magnetic circular dichroism study
journal, December 2006

First-Order Localized-Electron $⇆$ Collective-Electron Transition in LaCo $O_{3}$
journal, March 1967

Ferromagnetism enhanced by structural relaxation of biaxially compressed LaCoO ₃ films
journal, April 2011

Strain-Induced Ferromagnetism in Antiferromagnetic ${LuMnO}_{3}$ Thin Films
journal, July 2013

Different Look at the Spin State of ${Co}^{3 +}$ Ions in a ${CoO}_{5}$ Pyramidal Coordination
journal, May 2004

X-ray absorption and magnetic circular dichroism of ${LaCoO}_{3}$ , ${La}_{0.7} {Ce}_{0.3} {CoO}_{3}$ , and ${La}_{0.7} {Sr}_{0.3} {CoO}_{3}$ films: Evidence for cobalt-valence-dependent magnetism
journal, November 2010

Insulating Ferromagnetic ${LaCoO}_{3 - δ}$ Films: A Phase Induced by Ordering of Oxygen Vacancies
journal, February 2014

The oxygen vacancy effect on the magnetic property of the LaMnO _3−δ thin films
journal, March 2013

Ferrimagnetism in PrCoO $_{3}$ epitaxial films
journal, January 2013

Monoclinic Ferroelastic Domains in LaCoO3-Based Perovskites
journal, December 2007

Reversible strain effect on the magnetization of ${LaCoO}_{3}$ films
journal, March 2009

TEM observations of rhombohedral and monoclinic domains in LaCoO ₃ -based ceramics
journal, March 2008

Strain-driven spin-state transition and superexchange interaction in LaCoO $_{3}$ : $A b$ initio study
journal, July 2012

Tuning the magnetic properties of $La Co O_{3}$ thin films by epitaxial strain
journal, January 2008

Microscopic evidence of a strain-enhanced ferromagnetic state in LaCoO3 thin films
journal, August 2009

Impact of stress on oxygen vacancy ordering in epitaxial (La0.5Sr0.5)CoO3−∂ thin films
journal, May 2003

Ferromagnetic insulating state in tensile-strained LaCoO $_{3}$ thin films from LDA $+$ $U$ calculations
journal, April 2012

Ferromagnetism in $La Co O_{3}$
journal, July 2004

Oxygen vacancy ordering in epitaxial La0.5Sr0.5CoO3−∂ thin films on (001) LaAlO3
journal, October 2001

Structural effects on the spin-state transition in epitaxially strained ${LaCoO}_{3}$ films
journal, February 2009

Microstructure of epitaxial La _0.5 Sr _0.5 CoO ₃ /ferroelectric Pb _0.9 La _0.1 (Zr _0.2 Ti _0.8 ) _0.975 O ₃ /La _0.5 Sr _0.5 CoO ₃ heterostructures on LaAlO ₃
journal, September 1993

Controlling Orbital Moment and Spin Orientation in CoO Layers by Strain
journal, October 2005

Strain-Induced Spin States in Atomically Ordered Cobaltites
journal, January 2012

Epitaxial La0.5Sr0.5CoO3 thin films: Structure, magnetism, and transport
journal, July 2008

Structural and electronic properties of oxygen vacancies in cubic and antiferrodistortive phases of ${SrTiO}_{3}$
journal, May 2004

Ferromagnetic spin-correlations in strained LaCoO3 thin films
journal, November 2008

Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level
journal, August 2012

Lattice structure and magnetization of LaCoO3 thin films
text, January 2010

Strain-induced ferromagnetism in antiferromagnetic LuMnO3 thin films
text, January 2013

Controlling orbital moment and spin orientation in CoO layers by strain
text, January 2005

Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO _3−δ films
journal, August 2016

Atomic-resolution in-situ cooling study of oxygen vacancy ordering in La _0.5 Sr _0.5 CoO _3−δ thin films
journal, June 2019

Strain-induced high-temperature perovskite ferromagnetic insulator
journal, March 2018

Topotactic transition between perovskite and brownmillerite phases for epitaxial LaCoO _{3− δ} films and effects thus resulted
journal, February 2020

Low-energy orbital excitations in strained ${LaCoO}_{3}$ films
journal, October 2019

Ferromagnetism and Charge Order from a Frozen Electron Configuration in Strained Epitaxial ${LaCoO}_{3}$
journal, May 2018

Ferromagnetic and insulating behavior of ${LaCoO}_{3}$ films grown on a (001) ${SrTiO}_{3}$ substrate: A simple ionic picture explained ab initio
journal, October 2017

Switchable orbital polarization and magnetization in strained $LaCo O_{3}$ films
journal, January 2019

Direct imaging revealing halved ferromagnetism in tensile-strained $LaCo O_{3}$ thin films
journal, July 2019