Surface engineering with Ar+/O2                         + ion beam bombardment: Tuning the electronic and magnetic behavior of Ni80Fe20/La0.7Sr0.3MnO3/SrTiO3(001) junctions

I. Bergenti; P. K. Manna; C. H. Lin; P. Graziosi; X. Liu; G. L. Causer; F. Liscio; A. Ruotolo; V. A. Dediu; J. Van Lierop; F. Klose; K. W. Lin

doi:10.1063/1.5049235

Surface engineering with Ar⁺/O₂ ⁺ ion beam bombardment: Tuning the electronic and magnetic behavior of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃/SrTiO₃(001) junctions

I. Bergenti
, P. K. Manna
, C. H. Lin
, P. Graziosi
, X. Liu
, G. L. Causer
, F. Liscio
, A. Ruotolo
, V. A. Dediu
, J. Van Lierop
, F. Klose
, K. W. Lin

Research output: Contribution to journal › Article › Research › peer-review

6 Citations (Scopus)

Abstract

The magnetic and magnetotransport properties of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃ (NiFe/LSMO) bilayers were investigated after bombarding the LSMO surface with low-energy Ar⁺ or O₂ ⁺/Ar⁺ ion beams before the growth of the top NiFe layer. A variety of magnetic properties are revealed, including an asymmetric two-stepped hysteresis loop with an exchange bias loop shift, and alternatively, a symmetric two-stepped hysteresis loop with an enhanced coercivity. Polarized neutron reflectometry measurements provide details of the magnetic depth profile and interface layer magnetism at different temperatures. The LSMO surface modifications determine a complex magnetic and electric NiFe/LSMO interface having a strong effect on the magnetoresistance of the bilayer. Surface engineering based on ion beam bombardment is presented as a promising technique for optimizing the electronic and magnetic properties of NiFe/LSMO junctions for future device applications.

Original language	English
Article number	183903
Number of pages	10
Journal	Journal of Applied Physics
Volume	124
Issue number	18
DOIs	https://doi.org/10.1063/1.5049235
Publication status	Published - 14 Nov 2018
Externally published	Yes

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10.1063/1.5049235

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Bergenti, I., Manna, P. K., Lin, C. H., Graziosi, P., Liu, X., Causer, G. L., Liscio, F., Ruotolo, A., Dediu, V. A., Van Lierop, J., Klose, F., & Lin, K. W. (2018). Surface engineering with Ar⁺/O₂ ⁺ ion beam bombardment: Tuning the electronic and magnetic behavior of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃/SrTiO₃(001) junctions. Journal of Applied Physics, 124(18), Article 183903. https://doi.org/10.1063/1.5049235

@article{2d6bf6d420d94a67b221ac62a119ee94,

title = "Surface engineering with Ar+/O2 + ion beam bombardment: Tuning the electronic and magnetic behavior of Ni80Fe20/La0.7Sr0.3MnO3/SrTiO3(001) junctions",

abstract = "The magnetic and magnetotransport properties of Ni80Fe20/La0.7Sr0.3MnO3 (NiFe/LSMO) bilayers were investigated after bombarding the LSMO surface with low-energy Ar+ or O2 +/Ar+ ion beams before the growth of the top NiFe layer. A variety of magnetic properties are revealed, including an asymmetric two-stepped hysteresis loop with an exchange bias loop shift, and alternatively, a symmetric two-stepped hysteresis loop with an enhanced coercivity. Polarized neutron reflectometry measurements provide details of the magnetic depth profile and interface layer magnetism at different temperatures. The LSMO surface modifications determine a complex magnetic and electric NiFe/LSMO interface having a strong effect on the magnetoresistance of the bilayer. Surface engineering based on ion beam bombardment is presented as a promising technique for optimizing the electronic and magnetic properties of NiFe/LSMO junctions for future device applications.",

author = "I. Bergenti and Manna, \{P. K.\} and Lin, \{C. H.\} and P. Graziosi and X. Liu and Causer, \{G. L.\} and F. Liscio and A. Ruotolo and Dediu, \{V. A.\} and \{Van Lierop\}, J. and F. Klose and Lin, \{K. W.\}",

note = "Funding Information: The research was supported by CNR, Italy; NSERC, Canada; ANSTO, Australia; and MOST, Taiwan. I.B. acknowledges Dr. E. Lunedei and Dr. A. Riminucci for the support during MR measurements. P.G. acknowledges financial support from MIUR through PRIN project QCNaMos. G.L.C. acknowledges the support from the Australian Institute of Nuclear Science and Engineering (AINSE) Postgraduate Research Award (Award No. ALNSTU12030). X.L. appreciates the hospitality and support from ANSTO during his stay as an Asia-Oceania Neutron Scattering Association (AONSA) Young Research Fellow. K.-W.L. acknowledges support from ANSTO during a sabbatical leave. Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = nov,

day = "14",

doi = "10.1063/1.5049235",

language = "English",

volume = "124",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "18",

}

Bergenti, I, Manna, PK, Lin, CH, Graziosi, P, Liu, X, Causer, GL, Liscio, F, Ruotolo, A, Dediu, VA, Van Lierop, J, Klose, F & Lin, KW 2018, 'Surface engineering with Ar⁺/O₂ ⁺ ion beam bombardment: Tuning the electronic and magnetic behavior of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃/SrTiO₃(001) junctions', Journal of Applied Physics, vol. 124, no. 18, 183903. https://doi.org/10.1063/1.5049235

Surface engineering with Ar⁺/O₂ ⁺ ion beam bombardment: Tuning the electronic and magnetic behavior of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃/SrTiO₃(001) junctions. / Bergenti, I.; Manna, P. K.; Lin, C. H. et al.
In: Journal of Applied Physics, Vol. 124, No. 18, 183903, 14.11.2018.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Surface engineering with Ar+/O2 + ion beam bombardment

T2 - Tuning the electronic and magnetic behavior of Ni80Fe20/La0.7Sr0.3MnO3/SrTiO3(001) junctions

AU - Bergenti, I.

AU - Manna, P. K.

AU - Lin, C. H.

AU - Graziosi, P.

AU - Liu, X.

AU - Causer, G. L.

AU - Liscio, F.

AU - Ruotolo, A.

AU - Dediu, V. A.

AU - Van Lierop, J.

AU - Klose, F.

AU - Lin, K. W.

N1 - Funding Information: The research was supported by CNR, Italy; NSERC, Canada; ANSTO, Australia; and MOST, Taiwan. I.B. acknowledges Dr. E. Lunedei and Dr. A. Riminucci for the support during MR measurements. P.G. acknowledges financial support from MIUR through PRIN project QCNaMos. G.L.C. acknowledges the support from the Australian Institute of Nuclear Science and Engineering (AINSE) Postgraduate Research Award (Award No. ALNSTU12030). X.L. appreciates the hospitality and support from ANSTO during his stay as an Asia-Oceania Neutron Scattering Association (AONSA) Young Research Fellow. K.-W.L. acknowledges support from ANSTO during a sabbatical leave. Publisher Copyright: © 2018 Author(s).

PY - 2018/11/14

Y1 - 2018/11/14

N2 - The magnetic and magnetotransport properties of Ni80Fe20/La0.7Sr0.3MnO3 (NiFe/LSMO) bilayers were investigated after bombarding the LSMO surface with low-energy Ar+ or O2 +/Ar+ ion beams before the growth of the top NiFe layer. A variety of magnetic properties are revealed, including an asymmetric two-stepped hysteresis loop with an exchange bias loop shift, and alternatively, a symmetric two-stepped hysteresis loop with an enhanced coercivity. Polarized neutron reflectometry measurements provide details of the magnetic depth profile and interface layer magnetism at different temperatures. The LSMO surface modifications determine a complex magnetic and electric NiFe/LSMO interface having a strong effect on the magnetoresistance of the bilayer. Surface engineering based on ion beam bombardment is presented as a promising technique for optimizing the electronic and magnetic properties of NiFe/LSMO junctions for future device applications.

AB - The magnetic and magnetotransport properties of Ni80Fe20/La0.7Sr0.3MnO3 (NiFe/LSMO) bilayers were investigated after bombarding the LSMO surface with low-energy Ar+ or O2 +/Ar+ ion beams before the growth of the top NiFe layer. A variety of magnetic properties are revealed, including an asymmetric two-stepped hysteresis loop with an exchange bias loop shift, and alternatively, a symmetric two-stepped hysteresis loop with an enhanced coercivity. Polarized neutron reflectometry measurements provide details of the magnetic depth profile and interface layer magnetism at different temperatures. The LSMO surface modifications determine a complex magnetic and electric NiFe/LSMO interface having a strong effect on the magnetoresistance of the bilayer. Surface engineering based on ion beam bombardment is presented as a promising technique for optimizing the electronic and magnetic properties of NiFe/LSMO junctions for future device applications.

UR - https://www.scopus.com/pages/publications/85056572334

U2 - 10.1063/1.5049235

DO - 10.1063/1.5049235

M3 - Article

AN - SCOPUS:85056572334

SN - 0021-8979

VL - 124

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 18

M1 - 183903

ER -

Surface engineering with Ar+/O2 + ion beam bombardment: Tuning the electronic and magnetic behavior of Ni80Fe20/La0.7Sr0.3MnO3/SrTiO3(001) junctions

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Surface engineering with Ar⁺/O₂ ⁺ ion beam bombardment: Tuning the electronic and magnetic behavior of Ni₈₀Fe₂₀/La_0.7Sr_0.3MnO₃/SrTiO₃(001) junctions