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Title: Effects of Oxygen Modification on the Structural and Magnetic Properties of Highly Epitaxial La0.7Sr0.3MnO3 (LSMO) thin films

Journal Article · · Scientific Reports

Abstract La 0.7 Sr 0.3 MnO 3 , a strong semi-metallic ferromagnet having robust spin polarization and magnetic transition temperature ( T C ) well above 300 K, has attracted significant attention as a possible candidate for a wide range of memory, spintronic, and multifunctional devices. Since varying the oxygen partial pressure during growth is likely to change the structural and other physical functionalities of La 0.7 Sr 0.3 MnO 3 (LSMO) films, here we report detailed investigations on structure, along with magnetic behavior of LSMO films with same thickness (~30 nm) but synthesized at various oxygen partial pressures: 10, 30, 50, 100, 150, 200 and 250 mTorr. The observation of only ( 00   l ) reflections without any secondary peaks in the XRD patterns confirms the high-quality synthesis of the above-mentioned films. Surface morphology of the films reveals that these films are very smooth with low roughness, the thin films synthesized at 150 mTorr having the lowest average roughness. The increasing of magnetic T C and sharpness of the magnetic phase transitions with increasing oxygen growth pressure suggests that by decreasing the oxygen growth pressure leads to oxygen deficiencies in grown films which induce oxygen inhomogeneity. Thin films grown at 150 mTorr exhibits the highest magnetization with T C  = 340 K as these thin films possess the lowest roughness and might exhibit lowest oxygen vacancies and defects. Interpretation and significance of these results in the 30 nm LSMO thin films prepared at different oxygen growth pressures are also presented, along with the existence and growth pressure dependence of negative remanent magnetization (NRM) of the above-mentioned thin films.

Research Organization:
West Virginia Univ., Morgantown, WV (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
DOE (DE-SC0016176); SC0016176
OSTI ID:
1619675
Alternate ID(s):
OSTI ID: 1802851
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 10 Journal Issue: 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

References (41)

Vacancy defects in epitaxial La 0.7 Sr 0.3 MnO 3 thin films probed by a slow positron beam journal June 2004
Hidden Magnetic Configuration in Epitaxial La 1 x Sr x MnO 3 Films journal December 2010
Direct evidence for a half-metallic ferromagnet journal April 1998
Interface and Surface Cation Stoichiometry Modified by Oxygen Vacancies in Epitaxial Manganite Films journal June 2012
Artificial Construction of the Layered Ruddlesden–Popper Manganite La 2 Sr 2 Mn 3 O 10 by Reflection High Energy Electron Diffraction Monitored Pulsed Laser Deposition journal April 2012
Magnetic domain-wall dynamics in a submicrometre ferromagnetic structure journal January 2003
Growth of colossal magnetoresistance thin films on silicon journal August 1996
Electrostatic potential and valence modulation in La0.7Sr0.3MnO3 thin films journal September 2018
Effect of Interfacial Octahedral Behavior in Ultrathin Manganite Films journal April 2014
Growth of La 0.7 Sr 0.3 MnO 3 Thin-Films on SrTiO 3 (100) Substrate by Pulsed Laser Deposition: Structural, Optical and Electrical Properties journal November 2011
Oxygen pressure and thickness dependent lattice strain in La[sub 0.7]Sr[sub 0.3]MnO[sub 3] films journal January 2003
Spintronics: A Spin-Based Electronics Vision for the Future journal November 2001
Negative remanence in magnetic nanostructures journal January 1996
X-ray Reflectivity Studies on the Mixed Langmuir–Blodgett Monolayers of Thiol-Capped Gold Nanoparticles, Dipalmitoylphosphatidylcholine, and Sodium Dodecyl Sulfate journal September 2017
Room temperature multiferroic effects in superlattice nanocapacitors journal December 2010
Investigating Negative Magnetization and Blocking Temperature in Aggregates of Ferrite Nanoparticles journal October 2015
Physical Justification for Negative Remanent Magnetization in Homogeneous Nanoparticles journal September 2014
Critical thickness and orbital ordering in ultrathin La 0.7 Sr 0.3 MnO 3 films journal September 2008
The oxygen vacancy effect on the magnetic property of the LaMnO 3−δ thin films journal March 2013
X-Ray Reflectivity Studies of cPLA2α-C2 Domains Adsorbed onto Langmuir Monolayers of SOPC journal September 2005
Oxygen content of La1−xSrxMnO3−y thin films and its relation to electric-magnetic properties journal April 2006
Insights into the magnetic dead layer in La 0.7 Sr 0.3 MnO 3 thin films from temperature, magnetic field and thickness dependence of their magnetization journal May 2018
Preparation of atomically flat SrTiO 3 surfaces using a deionized-water leaching and thermal annealing procedure journal December 2012
Relations between the Concentrations of Imperfections in Crystalline Solids book January 1956
CMR manganites: physics, thin films and devices journal April 2003
Magnetic relaxation and correlating effective magnetic moment with particle size distribution in maghemite nanoparticles journal June 2015
Current understanding and applications of the RHEED intensity oscillation technique journal February 1987
Chemical expansion affected oxygen vacancy stability in different oxide structures from first principles calculations journal March 2015
Spacer layer and temperature driven magnetic properties in multilayer structured FeTaC thin films journal October 2013
Spin caloritronics journal April 2012
Colossal Terahertz Magnetoresistance at Room Temperature in Epitaxial La 0.7 Sr 0.3 MnO 3 Nanocomposites and Single-Phase Thin Films journal March 2017
Insulator-metal transition and giant magnetoresistance in La 1 x Sr x MnO 3 journal May 1995
Crystallinity, surface morphology, and magnetic properties of La0.7Sr0.3MnO3 thin films: An approach based on the laser ablation plume range models journal May 2003
Effects of oxygen pressure on lattice parameter, orientation, surface morphology and deposition rate of (Ba0.02Sr0.98)TiO3 thin films grown on MgO substrate by pulsed laser deposition journal August 2005
Epitaxial growth and magnetic/transport properties of La 0.7 Sr 0.3 MnO 3 thin films grown on SrTiO 3 with optimized growth conditions journal January 2017
Polarizing Oxygen Vacancies in Insulating Metal Oxides under a High Electric Field journal September 2017
Optimized fabrication of high-quality La 0.67 Sr 0.33 MnO 3 thin films considering all essential characteristics journal April 2011
Characterization of epitaxial LSMO thin films with high Curie temperature prepared on different substrates journal April 2016
Oxygen and disorder effect in the magnetic properties of manganite films journal May 2004
Relation between surface step density and RHEED intensity journal December 1993
The Role of Oxygen Vacancies on Magnetic Properties of LSMO
  • Alharbi, A. A.; Alkahtani, M.; Al-Dossary, O.
  • PROCEEDINGS OF THE FIFTH SAUDI PHYSICAL SOCIETY CONFERENCE (SPS5), AIP Conference Proceedings https://doi.org/10.1063/1.3638091
conference January 2011