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Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction

Year 2017, Volume: 7 Issue: 2, 125 - 130, 30.06.2017

Abstract

La
0.7Sr0.3MnO3/SrTiO3/La0.7Sr0.3MnO3 magnetic tunnel junction was grown on (001)-oriented SrTiO
3 substrate by using pulsed laser deposition technique. La0.7Sr0.3MnO3 (LSMO) was used as ferromagnetic
(FM) electrodes and SrTiO
3 (STO) was used as a tunnel barrier. The effect of temperature and magnetic feld on
electrical transport properties has been investigated. Bottom electrode and junction resistances were observed to
strongly depend on temperature. Large magnetoresistance of almost 300 % was observed at 77.3 K at low magnetic
felds of a few tens of Oe. The large magnetoresistance was explained by the nearly half-metallic band structure of
La
0.7Sr0.3MnO3. The asymmetry of TMR curves was attributed to the ferromagnetic electrodes with different thickness and the differences in the electronic states of the upper and lower STO/LSMO interfaces


References

  • Bowen M, Bibes M, Barthélémy A, Contour JP, Anane A, Lemaıtre Y, Fert A, 2003. Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments. Applied Physics Letters, 82: 233-235.
  • Boyraz C, Guler A, Ozdemir M, Oner Y, 2015. Structural and Superconductivity Properties of BaFe2−xPtxAs2. Journal of Superconductivity and Novel Magnetism, 30: 1145–1151.
  • Feng G, Dijken SV Feng JF, Coey JMD, Leo T, Smith DJ, 2009. Annealing of CoFeB/MgO based single and double barrier magnetic tunnel junctions: Tunnel magnetoresistance, bias dependence, and output voltage. Journal of Applied Physics, 105: 1-7.
  • Gong G, Gupta A, Xiao G, Qian W, Dravid V, 1997. Magnetoresistance and magnetic properties of epitaxial magnetite thin films. Physical Review B, 56: 5096-5099.
  • Gupta A, McGuire T, Duncombe P, Rupp M, Sun J, Gallagher W, Xiao G, 1995. Growth and giant magnetoresistance properties of La‐deficient LaxMnO3−δ(0.67≤x≤1) films. Applied Physics Letters, 67: 3494-3496.
  • Li X, Gupta A, Xiao G, Gong G, 1997. Low-field magnetoresistive properties of polycrystalline and epitaxial perovskite manganite films. Applied Physics Letters, 71: 1124-1126.
  • Liu Y-Z, Wang W, Moriyama GT, Xiao JQ, Zhang Z, 2007. Direct measurement of barrier asymmetry in AlOx /ZrOy magnetic tunnel junctions using off-axis electron holography. Physical Review B, 75:1-5.
  • Lu Y, Li X, Gong G, Xiao G, Gupta A, Lecoeur P, Sun J, Wang Y, Dravid V, 1996. Large magnetotunneling effect at low magnetic fields in micrometer-scale epitaxial La0.67Sr0.33MnO3 tunnel junctions. Physical Review B, 54: R8357-R8360.
  • Miao G-X, Müller M, Moodera JS, 2009. Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence. Physical Review Letters, 102: 1-4.
  • Miyazaki T, Tezuka N, 1995. Giant magnetic tunneling effect in Fe/Al2O3/Fe junction. Journal of Magnetism and Magnetic Materials, 139: L231-L234.
  • Moodera JS, Kinder LR, Wong TM, Meservey R, 1995. Large magnetoresistance at room temperature in ferromagnetic thin film tunnel junctions. Physical Review Letters, 74: 3273-3276.
  • Natarajarathinam A, Zhu R, Visscher P, Gupta S, 2012. Perpendicular magnetic tunnel junctions based on thin CoFeB free layer and Co-based multilayer synthetic antiferromagnet pinned layers. Journal of Applied Physics, 111: 1-3.
  • Noh JS, Nath TK, Eom CB, Sun JZ, Tian W, Pan X, 2001. Magnetotransport in manganite trilayer junctions grown by 90 off-axis sputtering. Applied Physics Letters, 79: 233-235.
  • Park JH, Vescovo E, Kim HJ, Kwon C, Ramesh R, Venkatesan T, 1998. Direct evidence for a half-metallic ferromagnet. Nature, 392: 794-796.
  • Rizwan S, Guo S, Wang Y, Wen Z, Zhang S, Zhao Y, Zou J, Han X, 2010. Temperature and Bias-Assisted Transport Properties of LSMO/AlO/CoFeB Magnetic Tunnel Junction. IEEE Transactions on Magnetics, 46: 2383-2386.
  • Sahin G, 2016. Effect of wavelength on the electrical parameters of a vertical parallel junction silicon solar cell illuminated by its rear side in frequency domain. Results in Physics, 6: 107-111.
  • Sun J, Gallagher W, Duncombe P, Krusin‐Elbaum L, Altman R, Gupta A, Lu Y, Gong G, Xiao G, 1996. Observation of large low‐field magnetoresistance in trilayer perpendicular transport devices made using doped manganate perovskites. Applied Physics Letters, 69: 3266-3268.
  • Useinov A, Kosel J, 2011. Spin Asymmetry Calculations of the TMR-V Curves in Single and Double-Barrier Magnetic Tunnel Junctions. IEEE Transactions on Magnetics, 47: 2724-2727.
  • Viret M, Drouet M, Nassar J, Contour J, Fermon C, Fert A, 1997. Low-field colossal magnetoresistance in manganite tunnel spin valves. Europhysics Letters, 39: 545-550.
  • Werner R, Petrov AY, Miño LA, Kleiner R, Koelle D, Davidson BA, 2011. Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy. Applied Physics Letters, 98: 1-3.
  • Wikipedia, 2017. Electrical resistivity and conductivity. https://en.wikipedia.org/wiki (04.02.2017)
  • Wolf SA, Awschalom DD, Buhrman RA, Daughton JM, von Molnár S, Roukes ML, Chtchelkanova AY, Treger DM, 2001. Spintronics: A Spin-Based Electronics Vision for the Future. Science, 294: 1488-1495.
  • Wolf SA, Chtchelkanova AY, Treger DM, 2006. Spintronics: a retrospective and perspective. IBM Journal of Research and Development, 50: 101-110.
  • Wu H-C, Coileáin CÓ, Abid M, Mauit O, Syrlybekov A, Khalid A, Xu H, Gatensby R, Wang JJ, Liu H, Yang L, Duesberg GS., Zhang H-Z, Abid M, Shvets IV, 2015. Spin-dependent transport properties of Fe3O4/MoS2/Fe3O4 junctions. Scientific Reports, 5:1-8.
  • Zhang Z, Ranjith R, Xie B, You L, Wong L, Wang S, Wang J, Prellier W, Zhao Y, Wu T, 2010. Enhanced low field magnetoresistance in nanocrystalline La0.7Sr0.3MnO3 synthesized on MgO nanowires. Applied Physics Letters, 96: 1-3.

LSMO/STO/LSMO Manyetik Tünel Ekleminin Zayıf Manyetik Alanlarda Tünelleme Manyetodirenci

Year 2017, Volume: 7 Issue: 2, 125 - 130, 30.06.2017

Abstract

Darbeli lazer biriktirme tekniği kullanılarak La0.7Sr0.3MnO3/SrTiO3/La0.7Sr0.3MnO3 manyetik tünel eklemi
SrTiO
3alttaş üzerinde büyütüldü. Ferromanyetik elektrot için La0.7Sr0.3MnO3 (LSMO) ve tünelleme bariyeri için SrTiO
3 (STO) kullanıldı. Sıcaklığın ve manyetik alanın elektriksel özelliklere etkisi araştırıldı. Alt elektrot ve eklem
dirençlerinin çok güçlü bir şekilde sıcaklığa bağlı olduğu gözlemlendi. 77.3 K sıcaklık ve zayıf manyetik alanlarda
yaklaşık % 300’lük yüksek manyetodirenç gözlemlendi. Gözlemlenen yüksek manyetodirenç La
0.7Sr0.3MnO3’ün
yarımetalik band yapısından kaynaklanır. TMR eğrilerinin asimetrik yapısı, farklı kalınlıktaki elektrotlar ile üst ve
alt STO/LSMO ara yüzeylerin elektronik yapılarının farklılığına atfedildi



References

  • Bowen M, Bibes M, Barthélémy A, Contour JP, Anane A, Lemaıtre Y, Fert A, 2003. Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments. Applied Physics Letters, 82: 233-235.
  • Boyraz C, Guler A, Ozdemir M, Oner Y, 2015. Structural and Superconductivity Properties of BaFe2−xPtxAs2. Journal of Superconductivity and Novel Magnetism, 30: 1145–1151.
  • Feng G, Dijken SV Feng JF, Coey JMD, Leo T, Smith DJ, 2009. Annealing of CoFeB/MgO based single and double barrier magnetic tunnel junctions: Tunnel magnetoresistance, bias dependence, and output voltage. Journal of Applied Physics, 105: 1-7.
  • Gong G, Gupta A, Xiao G, Qian W, Dravid V, 1997. Magnetoresistance and magnetic properties of epitaxial magnetite thin films. Physical Review B, 56: 5096-5099.
  • Gupta A, McGuire T, Duncombe P, Rupp M, Sun J, Gallagher W, Xiao G, 1995. Growth and giant magnetoresistance properties of La‐deficient LaxMnO3−δ(0.67≤x≤1) films. Applied Physics Letters, 67: 3494-3496.
  • Li X, Gupta A, Xiao G, Gong G, 1997. Low-field magnetoresistive properties of polycrystalline and epitaxial perovskite manganite films. Applied Physics Letters, 71: 1124-1126.
  • Liu Y-Z, Wang W, Moriyama GT, Xiao JQ, Zhang Z, 2007. Direct measurement of barrier asymmetry in AlOx /ZrOy magnetic tunnel junctions using off-axis electron holography. Physical Review B, 75:1-5.
  • Lu Y, Li X, Gong G, Xiao G, Gupta A, Lecoeur P, Sun J, Wang Y, Dravid V, 1996. Large magnetotunneling effect at low magnetic fields in micrometer-scale epitaxial La0.67Sr0.33MnO3 tunnel junctions. Physical Review B, 54: R8357-R8360.
  • Miao G-X, Müller M, Moodera JS, 2009. Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence. Physical Review Letters, 102: 1-4.
  • Miyazaki T, Tezuka N, 1995. Giant magnetic tunneling effect in Fe/Al2O3/Fe junction. Journal of Magnetism and Magnetic Materials, 139: L231-L234.
  • Moodera JS, Kinder LR, Wong TM, Meservey R, 1995. Large magnetoresistance at room temperature in ferromagnetic thin film tunnel junctions. Physical Review Letters, 74: 3273-3276.
  • Natarajarathinam A, Zhu R, Visscher P, Gupta S, 2012. Perpendicular magnetic tunnel junctions based on thin CoFeB free layer and Co-based multilayer synthetic antiferromagnet pinned layers. Journal of Applied Physics, 111: 1-3.
  • Noh JS, Nath TK, Eom CB, Sun JZ, Tian W, Pan X, 2001. Magnetotransport in manganite trilayer junctions grown by 90 off-axis sputtering. Applied Physics Letters, 79: 233-235.
  • Park JH, Vescovo E, Kim HJ, Kwon C, Ramesh R, Venkatesan T, 1998. Direct evidence for a half-metallic ferromagnet. Nature, 392: 794-796.
  • Rizwan S, Guo S, Wang Y, Wen Z, Zhang S, Zhao Y, Zou J, Han X, 2010. Temperature and Bias-Assisted Transport Properties of LSMO/AlO/CoFeB Magnetic Tunnel Junction. IEEE Transactions on Magnetics, 46: 2383-2386.
  • Sahin G, 2016. Effect of wavelength on the electrical parameters of a vertical parallel junction silicon solar cell illuminated by its rear side in frequency domain. Results in Physics, 6: 107-111.
  • Sun J, Gallagher W, Duncombe P, Krusin‐Elbaum L, Altman R, Gupta A, Lu Y, Gong G, Xiao G, 1996. Observation of large low‐field magnetoresistance in trilayer perpendicular transport devices made using doped manganate perovskites. Applied Physics Letters, 69: 3266-3268.
  • Useinov A, Kosel J, 2011. Spin Asymmetry Calculations of the TMR-V Curves in Single and Double-Barrier Magnetic Tunnel Junctions. IEEE Transactions on Magnetics, 47: 2724-2727.
  • Viret M, Drouet M, Nassar J, Contour J, Fermon C, Fert A, 1997. Low-field colossal magnetoresistance in manganite tunnel spin valves. Europhysics Letters, 39: 545-550.
  • Werner R, Petrov AY, Miño LA, Kleiner R, Koelle D, Davidson BA, 2011. Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy. Applied Physics Letters, 98: 1-3.
  • Wikipedia, 2017. Electrical resistivity and conductivity. https://en.wikipedia.org/wiki (04.02.2017)
  • Wolf SA, Awschalom DD, Buhrman RA, Daughton JM, von Molnár S, Roukes ML, Chtchelkanova AY, Treger DM, 2001. Spintronics: A Spin-Based Electronics Vision for the Future. Science, 294: 1488-1495.
  • Wolf SA, Chtchelkanova AY, Treger DM, 2006. Spintronics: a retrospective and perspective. IBM Journal of Research and Development, 50: 101-110.
  • Wu H-C, Coileáin CÓ, Abid M, Mauit O, Syrlybekov A, Khalid A, Xu H, Gatensby R, Wang JJ, Liu H, Yang L, Duesberg GS., Zhang H-Z, Abid M, Shvets IV, 2015. Spin-dependent transport properties of Fe3O4/MoS2/Fe3O4 junctions. Scientific Reports, 5:1-8.
  • Zhang Z, Ranjith R, Xie B, You L, Wong L, Wang S, Wang J, Prellier W, Zhao Y, Wu T, 2010. Enhanced low field magnetoresistance in nanocrystalline La0.7Sr0.3MnO3 synthesized on MgO nanowires. Applied Physics Letters, 96: 1-3.
There are 25 citations in total.

Details

Primary Language English
Journal Section Elektrik Elektronik Mühendisliği / Electrical Electronic Engineering
Authors

Ramazan Topkaya

Publication Date June 30, 2017
Submission Date November 29, 2016
Acceptance Date May 23, 2017
Published in Issue Year 2017 Volume: 7 Issue: 2

Cite

APA Topkaya, R. (2017). Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. Journal of the Institute of Science and Technology, 7(2), 125-130.
AMA Topkaya R. Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. J. Inst. Sci. and Tech. June 2017;7(2):125-130.
Chicago Topkaya, Ramazan. “Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction”. Journal of the Institute of Science and Technology 7, no. 2 (June 2017): 125-30.
EndNote Topkaya R (June 1, 2017) Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. Journal of the Institute of Science and Technology 7 2 125–130.
IEEE R. Topkaya, “Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction”, J. Inst. Sci. and Tech., vol. 7, no. 2, pp. 125–130, 2017.
ISNAD Topkaya, Ramazan. “Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction”. Journal of the Institute of Science and Technology 7/2 (June 2017), 125-130.
JAMA Topkaya R. Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. J. Inst. Sci. and Tech. 2017;7:125–130.
MLA Topkaya, Ramazan. “Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction”. Journal of the Institute of Science and Technology, vol. 7, no. 2, 2017, pp. 125-30.
Vancouver Topkaya R. Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. J. Inst. Sci. and Tech. 2017;7(2):125-30.