Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier

Althammer, Matthias; Vikam Singh, Amit; Keshavarz, Sahar; Kenan Yurtisigi, Mehmet; Mishra, Rohan; Borisevich, Albina Y.; LeClair, Patrick; Gupta, Arunava

doi:10.1063/1.4972103

Title: Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier

Abstract

In this paper, we experimentally investigate the structural, magnetic, and electrical transport properties of La_0.67 Sr_0.33MnO₃ based magnetic tunnel junctions with a SrSnO₃ barrier. Our results show that despite the high density of defects in the strontium stannate barrier, due to the large lattice mismatch, the observed tunnel magnetoresistance (TMR) is comparable to tunnel junctions with a better lattice matched SrTiO₃ barrier, reaching values of up to 350% at T = 5K. Further analysis of the current-voltage characteristics of the junction and the bias voltage dependence of the observed tunnel magnetoresistance show a decrease of the TMR with increasing bias voltage. In addition, the observed TMR vanishes for T > 200K. Finally, our results suggest that by employing a better lattice matched ferromagnetic electrode, and thus reducing the structural defects in the strontium stannate barrier, even larger TMR ratios might be possible in the future.

Authors:

Althammer, Matthias ^[1]; Bavarian Academy of Sciences and Humanities ^[2]; Vikam Singh, Amit ^[3]; Keshavarz, Sahar ^[4]; Kenan Yurtisigi, Mehmet ^[4]; Mishra, Rohan ^[5]; Oak Ridge National Lab. ^[6]; Borisevich, Albina Y. ^[7]; LeClair, Patrick ^[4]; Gupta, Arunava ^[3]

Univ. of Alabama, Tuscaloosa, AL (United States). MINT Center
(BADW), Garching (Germany). Walther-Meissner Inst.
Univ. of Alabama, Tuscaloosa, AL (United States). MINT Center. Dept. of Chemistry and Chemical Engineering
Univ. of Alabama, Tuscaloosa, AL (United States). MINT Center. Dept. of Physics and Astronomy
Washington Univ., St. Louis, MO (United States). Dept. of Mechanical Engineering and Materials Science
(ORNL), Oak Ridge, TN (United States). Materials Sciences and Technology Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Sciences and Technology Division

Publication Date:: Fri Dec 16 00:00:00 EST 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Alabama, Tuscaloosa, AL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Contributing Org.:: Bavarian Academy of Sciences and Humanities (BADW), Garching (Germany); Washington Univ., St. Louis, MO (United States)

OSTI Identifier:: 1340473

Grant/Contract Number:: AC05-00OR22725; 1509875

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 120; Journal Issue: 23; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; magnetic tunnel junctions; electrodes; magnetoresistance; multilayers; magnetic fields

Citation Formats


                    Althammer, Matthias, Bavarian Academy of Sciences and Humanities, Vikam Singh, Amit, Keshavarz, Sahar, Kenan Yurtisigi, Mehmet, Mishra, Rohan, Oak Ridge National Lab., Borisevich, Albina Y., LeClair, Patrick, and Gupta, Arunava. Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4972103.

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                    Althammer, Matthias, Bavarian Academy of Sciences and Humanities, Vikam Singh, Amit, Keshavarz, Sahar, Kenan Yurtisigi, Mehmet, Mishra, Rohan, Oak Ridge National Lab., Borisevich, Albina Y., LeClair, Patrick, & Gupta, Arunava. Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier.  United States.  https://doi.org/10.1063/1.4972103

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                    Althammer, Matthias, Bavarian Academy of Sciences and Humanities, Vikam Singh, Amit, Keshavarz, Sahar, Kenan Yurtisigi, Mehmet, Mishra, Rohan, Oak Ridge National Lab., Borisevich, Albina Y., LeClair, Patrick, and Gupta, Arunava. Fri .  
"Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier".  United States.  https://doi.org/10.1063/1.4972103.  https://www.osti.gov/servlets/purl/1340473.

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@article{osti_1340473,

  title        = {Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier},

  author       = {Althammer, Matthias and Bavarian Academy of Sciences and Humanities and Vikam Singh, Amit and Keshavarz, Sahar and Kenan Yurtisigi, Mehmet and Mishra, Rohan and Oak Ridge National Lab. and Borisevich, Albina Y. and LeClair, Patrick and Gupta, Arunava},

  abstractNote = {In this paper, we experimentally investigate the structural, magnetic, and electrical transport properties of La0.67 Sr0.33MnO3 based magnetic tunnel junctions with a SrSnO3 barrier. Our results show that despite the high density of defects in the strontium stannate barrier, due to the large lattice mismatch, the observed tunnel magnetoresistance (TMR) is comparable to tunnel junctions with a better lattice matched SrTiO3 barrier, reaching values of up to 350% at T = 5K. Further analysis of the current-voltage characteristics of the junction and the bias voltage dependence of the observed tunnel magnetoresistance show a decrease of the TMR with increasing bias voltage. In addition, the observed TMR vanishes for T > 200K. Finally, our results suggest that by employing a better lattice matched ferromagnetic electrode, and thus reducing the structural defects in the strontium stannate barrier, even larger TMR ratios might be possible in the future.},

  doi          = {10.1063/1.4972103},

  journal      = {Journal of Applied Physics},

  number       = 23,

  volume       = 120,

  place        = {United States},

  year         = {Fri Dec 16 00:00:00 EST 2016},

  month        = {Fri Dec 16 00:00:00 EST 2016}

}

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Title: Investigation of the tunnel magnetoresistance in junctions with a strontium stannate barrier

Abstract

Citation Formats

The phenomena of spin-filter tunnelling journal, April 2007

Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers journal, October 2004

Giant room-temperature magnetoresistance in single-crystal Fe/MgO/Fe magnetic tunnel junctions journal, October 2004

Misfit strain accommodation in epitaxial A B O 3 perovskites: Lattice rotations and lattice modulations journal, February 2011

Electric field-induced magnetization reversal in a perpendicular-anisotropy CoFeB-MgO magnetic tunnel junction journal, September 2012

Large magnetotunneling effect at low magnetic fields in micrometer-scale epitaxial La 0.67 Sr 0.33 Mn O 3 tunnel junctions journal, September 1996

Photoluminescence and photocatalytic properties of SrSnO3 perovskite journal, January 2006

Observation of large low‐field magnetoresistance in trilayer perpendicular transport devices made using doped manganate perovskites journal, November 1996

Data Storage: Review of Heusler Compounds journal, December 2012

Tunnel magnetoresistance of 604% at 300K by suppression of Ta diffusion in CoFeB∕MgO∕CoFeB pseudo-spin-valves annealed at high temperature journal, August 2008

Nanoscale Multiphase Separation at La 2 / 3 Ca 1 / 3 MnO 3 / SrTiO 3 Interfaces journal, July 2001

Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments journal, January 2003

Thickness-dependent magnetotransport in ultrathin manganite films journal, May 1999

Crystal structure of double oxides of the perovskite type journal, March 1946

Tunneling between ferromagnetic films journal, September 1975

Generalized Formula for the Electric Tunnel Effect between Similar Electrodes Separated by a Thin Insulating Film journal, June 1963

Quantitative measurement of displacement and strain fields from HREM micrographs journal, August 1998

Large magnetoresistance in bcc Co ∕ Mg O ∕ Co and Fe Co ∕ Mg O ∕ Fe Co tunnel junctions journal, November 2004

Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy journal, April 2011

Ferroelectric tunnel junctions for information storage and processing journal, July 2014

Structure and band gap tuning of transparent (Ba 1−x Sr x )SnO 3 thin films epitaxially grown on MgO substrates journal, May 2012

Bulk electronic structure of SrTiO3: Experiment and theory journal, December 2001

Low B2 crystallization temperature and high tunnel magnetoresistance in magnetic tunnel junctions journal, April 2010

Electric-field-assisted switching in magnetic tunnel junctions journal, November 2011

Temperature dependence of the interfacial spin polarization of La 2 / 3 Sr 1 / 3 MnO 3 journal, February 2004

The phenomena of spin-filter tunnelling
journal, April 2007

Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers
journal, October 2004

Giant room-temperature magnetoresistance in single-crystal Fe/MgO/Fe magnetic tunnel junctions
journal, October 2004

Misfit strain accommodation in epitaxial $A B O_{3}$ perovskites: Lattice rotations and lattice modulations
journal, February 2011

Electric field-induced magnetization reversal in a perpendicular-anisotropy CoFeB-MgO magnetic tunnel junction
journal, September 2012

Large magnetotunneling effect at low magnetic fields in micrometer-scale epitaxial ${La}_{0.67}$ ${Sr}_{0.33}$ Mn $O_{3}$ tunnel junctions
journal, September 1996

Photoluminescence and photocatalytic properties of SrSnO3 perovskite
journal, January 2006

Observation of large low‐field magnetoresistance in trilayer perpendicular transport devices made using doped manganate perovskites
journal, November 1996

Data Storage: Review of Heusler Compounds
journal, December 2012

Tunnel magnetoresistance of 604% at 300K by suppression of Ta diffusion in CoFeB∕MgO∕CoFeB pseudo-spin-valves annealed at high temperature
journal, August 2008

Nanoscale Multiphase Separation at ${La}_{2 / 3} {Ca}_{1 / 3} {MnO}_{3} / {SrTiO}_{3}$ Interfaces
journal, July 2001

Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments
journal, January 2003

Thickness-dependent magnetotransport in ultrathin manganite films
journal, May 1999

Crystal structure of double oxides of the perovskite type
journal, March 1946

Tunneling between ferromagnetic films
journal, September 1975

Generalized Formula for the Electric Tunnel Effect between Similar Electrodes Separated by a Thin Insulating Film
journal, June 1963

Quantitative measurement of displacement and strain fields from HREM micrographs
journal, August 1998

Large magnetoresistance in bcc $Co ∕ Mg O ∕ Co$ and $Fe Co ∕ Mg O ∕ Fe Co$ tunnel junctions
journal, November 2004

Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy
journal, April 2011

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journal, May 2012

Bulk electronic structure of SrTiO3: Experiment and theory
journal, December 2001

Low B2 crystallization temperature and high tunnel magnetoresistance in magnetic tunnel junctions
journal, April 2010

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Temperature dependence of the interfacial spin polarization of ${La}_{2 / 3} {Sr}_{1 / 3} {MnO}_{3}$
journal, February 2004