Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films

Wisser, Jacob J.; Emori, Satoru; Riddiford, Lauren; Altman, Aaron; Li, Peng; Mahalingam, Krishnamurthy; Urwin, Brittany T.; Howe, Brandon M.; Page, Michael R.; Grutter, Alexander J.; Kirby, Brian J.; Suzuki, Yuri

doi:10.1063/1.5111326

Title: Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films

Abstract

Low-damping magnetic oxide thin films with small thicknesses are essential for efficient insulator spintronic devices, particularly those driven by spin torque effects. Here, we investigate the depth-resolved compositional and magnetic properties of epitaxial spinel MgAl_0.5Fe_1.5O₄ (MAFO), which has recently been reported as a promising low-damping insulator. We find that ≈11nm films exhibit optimal Gilbert damping, with a typical damping parameter of 0.001. While defects due to strain relaxation in the bulk of the film contribute to increased damping for large film thickness, the damping increase in thinner films is attributed to the presence of a chemically disordered magnetic dead layer at the film/substrate interface. This interfacial dead layer arises from an Fe-deficient MAFO layer. Notably, this layer is only about one-sixth the thickness of that found at the interface between yttrium iron garnet films and gadolinium gallium garnet substrates, making MAFO an ideal thin-film insulator for spin-torque applications.

Authors:

^[1];

^[2];

^[1]; Altman, Aaron ^[1]; Li, Peng ^[3]; Mahalingam, Krishnamurthy ^[4]; Urwin, Brittany T. ^[4]; Howe, Brandon M. ^[4];

^[4];

^[5];

^[1]

Stanford Univ., CA (United States)
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
Air Force Research Lab. (AFRL), Wright-Patterson AFB, OH (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research

Publication Date:: Tue Sep 24 00:00:00 EDT 2019

Research Org.:: Stanford Univ., CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

OSTI Identifier:: 1611065

Alternate Identifier(s):: OSTI ID: 1566175

Grant/Contract Number:: SC0008505; N00014-15-1-0045

Resource Type:: Accepted Manuscript

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 115; Journal Issue: 13; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; physics; low loss; spin current; oxide films

Citation Formats


                    Wisser, Jacob J., Emori, Satoru, Riddiford, Lauren, Altman, Aaron, Li, Peng, Mahalingam, Krishnamurthy, Urwin, Brittany T., Howe, Brandon M., Page, Michael R., Grutter, Alexander J., Kirby, Brian J., and Suzuki, Yuri. Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films.  United States: N. p., 2019. 
Web.  doi:10.1063/1.5111326.

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                    Wisser, Jacob J., Emori, Satoru, Riddiford, Lauren, Altman, Aaron, Li, Peng, Mahalingam, Krishnamurthy, Urwin, Brittany T., Howe, Brandon M., Page, Michael R., Grutter, Alexander J., Kirby, Brian J., & Suzuki, Yuri. Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films.  United States.  https://doi.org/10.1063/1.5111326

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                    Wisser, Jacob J., Emori, Satoru, Riddiford, Lauren, Altman, Aaron, Li, Peng, Mahalingam, Krishnamurthy, Urwin, Brittany T., Howe, Brandon M., Page, Michael R., Grutter, Alexander J., Kirby, Brian J., and Suzuki, Yuri. Tue .  
"Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films".  United States.  https://doi.org/10.1063/1.5111326.  https://www.osti.gov/servlets/purl/1611065.

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@article{osti_1611065,

  title        = {Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films},

  author       = {Wisser, Jacob J. and Emori, Satoru and Riddiford, Lauren and Altman, Aaron and Li, Peng and Mahalingam, Krishnamurthy and Urwin, Brittany T. and Howe, Brandon M. and Page, Michael R. and Grutter, Alexander J. and Kirby, Brian J. and Suzuki, Yuri},

  abstractNote = {Low-damping magnetic oxide thin films with small thicknesses are essential for efficient insulator spintronic devices, particularly those driven by spin torque effects. Here, we investigate the depth-resolved compositional and magnetic properties of epitaxial spinel MgAl0.5Fe1.5O4 (MAFO), which has recently been reported as a promising low-damping insulator. We find that ≈11nm films exhibit optimal Gilbert damping, with a typical damping parameter of 0.001. While defects due to strain relaxation in the bulk of the film contribute to increased damping for large film thickness, the damping increase in thinner films is attributed to the presence of a chemically disordered magnetic dead layer at the film/substrate interface. This interfacial dead layer arises from an Fe-deficient MAFO layer. Notably, this layer is only about one-sixth the thickness of that found at the interface between yttrium iron garnet films and gadolinium gallium garnet substrates, making MAFO an ideal thin-film insulator for spin-torque applications.},

  doi          = {10.1063/1.5111326},

  journal      = {Applied Physics Letters},

  number       = 13,

  volume       = 115,

  place        = {United States},

  year         = {Tue Sep 24 00:00:00 EDT 2019},

  month        = {Tue Sep 24 00:00:00 EDT 2019}

}

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Title: Ultrathin interfacial layer with suppressed room temperature magnetization in magnesium aluminum ferrite thin films

Abstract

Citation Formats

Spin Pumping at the Magnetic Insulator (YIG)/Normal Metal (Au) Interfaces journal, August 2011

Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta journal, May 2013

Damping in Yttrium Iron Garnet Nanoscale Films Capped by Platinum journal, September 2013

Enhanced spin pumping at yttrium iron garnet/Au interfaces journal, February 2012

Growth and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films journal, October 2012

Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers journal, January 2014

Coexistence of Low Damping and Strong Magnetoelastic Coupling in Epitaxial Spinel Ferrite Thin Films journal, July 2017

Unexpected structural and magnetic depth dependence of YIG thin films journal, September 2017

Spin caloritronic nano-oscillator journal, July 2017

Ultralow Damping in Nanometer-Thick Epitaxial Spinel Ferrite Thin Films journal, May 2018

Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin–orbit torque journal, January 2016

Preparation of MgIn 2 O 4 Epitaxial Oxide Electrode with Spinel Structure and Heteroepitaxial Growth of BaTiO 3 –NiFe 2 O 4 Multiferroic Composite Thin Film journal, September 2009

Magnetotransport in La0.7Sr0.3MnO3/CuCr2O4/Fe3O4 magnetic junctions journal, January 2015

Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system journal, August 2013

Interfacial Origin of the Magnetisation Suppression of Thin Film Yttrium Iron Garnet journal, September 2017

Thickness and power dependence of the spin-pumping effect in Y 3 Fe 5 O 12 /Pt heterostructures measured by the inverse spin Hall effect journal, April 2015

Atomic structure of the interface between SrTiO3 thin films and Si(001) substrates journal, September 2008

Current-induced switching in a magnetic insulator journal, November 2016

Use of misfit strain to remove dislocations from epitaxial thin films journal, April 1976

Spin-Current Generation in Low-Damping Ni 0.65 Zn 0.35 Al 0.8 Fe 1.2 O 4 Spinel Ferrite journal, June 2018

Spin-polarized conduction in oxide magnetic tunnel junctions with magnetic and nonmagnetic insulating barrier layers journal, October 2006

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films journal, May 2014

Magnon spintronics journal, June 2015

Controlled enhancement of spin-current emission by three-magnon splitting journal, July 2011

Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect journal, February 2016

Pulsed laser deposition of epitaxial yttrium iron garnet films with low Gilbert damping and bulk-like magnetization journal, October 2014

Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta text, January 2013

Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque text, January 2015

Spin Pumping at the Magnetic Insulator (YIG)/Normal Metal (Au) Interfaces
journal, August 2011

Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta
journal, May 2013

Damping in Yttrium Iron Garnet Nanoscale Films Capped by Platinum
journal, September 2013

Enhanced spin pumping at yttrium iron garnet/Au interfaces
journal, February 2012

Growth and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films
journal, October 2012

Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers
journal, January 2014

Coexistence of Low Damping and Strong Magnetoelastic Coupling in Epitaxial Spinel Ferrite Thin Films
journal, July 2017

Unexpected structural and magnetic depth dependence of YIG thin films
journal, September 2017

Spin caloritronic nano-oscillator
journal, July 2017

Ultralow Damping in Nanometer-Thick Epitaxial Spinel Ferrite Thin Films
journal, May 2018

Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin–orbit torque
journal, January 2016

Preparation of MgIn ₂ O ₄ Epitaxial Oxide Electrode with Spinel Structure and Heteroepitaxial Growth of BaTiO ₃ –NiFe ₂ O ₄ Multiferroic Composite Thin Film
journal, September 2009

Magnetotransport in La0.7Sr0.3MnO3/CuCr2O4/Fe3O4 magnetic junctions
journal, January 2015

Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system
journal, August 2013

Interfacial Origin of the Magnetisation Suppression of Thin Film Yttrium Iron Garnet
journal, September 2017

Thickness and power dependence of the spin-pumping effect in $Y_{3} {Fe}_{5} O_{12}$ /Pt heterostructures measured by the inverse spin Hall effect
journal, April 2015

Atomic structure of the interface between SrTiO3 thin films and Si(001) substrates
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Current-induced switching in a magnetic insulator
journal, November 2016

Use of misfit strain to remove dislocations from epitaxial thin films
journal, April 1976

Spin-Current Generation in Low-Damping ${Ni}_{0.65} {Zn}_{0.35} {Al}_{0.8} {Fe}_{1.2} O_{4}$ Spinel Ferrite
journal, June 2018

Spin-polarized conduction in oxide magnetic tunnel junctions with magnetic and nonmagnetic insulating barrier layers
journal, October 2006

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films
journal, May 2014

Magnon spintronics
journal, June 2015

Controlled enhancement of spin-current emission by three-magnon splitting
journal, July 2011

Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect
journal, February 2016

Pulsed laser deposition of epitaxial yttrium iron garnet films with low Gilbert damping and bulk-like magnetization
journal, October 2014

Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta
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Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque
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