Abstract
The correlated room temperature ferromagnetism and photoluminescence were investigated in Al-doped SnO2 nanoparticles (about 50 nm) synthesized by the sol-gel method. X-ray diffraction and selected area electron diffraction results show that the Sn1−x Al x O2 samples possess typical rutile structure and have no other impurity phases with Al fractions of up to 8 at.%. The optical bandgap energies decrease, while the Urbach energies increase with Al concentration. The ferromagnetic signature was found to be significantly enhanced after Al doping, with the saturation magnetization reaching a maximum of 7.3 × 10−3 emu/g in Sn0.92Al0.08O2 sample. The photoluminescence studies clearly indicated the presence of a large concentration of singly ionized oxygen vacancies in the pure and Al-doped SnO2 nanoparticles. An interesting correlation between the saturation magnetization and green–yellow luminescence intensity with the increase of Al doping has suggested that the observed ferromagnetic ordering of the Sn1−x Al x O2 nanoparticles is related to the singly ionized oxygen vacancies.
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References
Bahsi BZ, Oraln AY (2007) Effects of Mn and Cu doping on the microstructures and optical properties of sol-gel derived ZnO thin films. Opt Mater 29:672–678
Banerjee S, Mandal M, Gayathri N, Sardar M (2007) Enhancement of ferromagnetism upon thermal annealing in pure ZnO. Appl Phys Lett 91:182501
Bansal S, Pandya DK, Kashyap SC, Haranath D (2014) Growth ambient dependence of defects, structural disorder and photoluminescence in SnO2 films deposited by reactive magnetron sputtering. J Alloy Comp 583:186–190
Chang GS, Forrest J, Kurmaev EZ, Morozovska AN, Glinchuk MD, McLeod JA, Moewes A, Surkova TP, Hong NH (2012) Oxygen-vacancy-induced ferromagnetism in undoped SnO2 thin films. Phys Rev B 85:165319
Chetri P, Saikia B, Choudhury A (2013) Structural and optical properties of Cu doped SnO2 nanoparticles: an experimental and density functional study. J Appl Phys 113:233514
Das S, Kar S, Chaudhuri S (2006) Optical properties of SnO2 nanoparticles and nanorods synthesized by solvothermal process. J Appl Phys 99:114303
Gao DQ, Zhang J, Yang GJ, Zhang JL, Shi ZH, Qi J, Zhang ZH, Xue DS (2010) Ferromagnetism in ZnO nanoparticles induced by doping of a nonmagnetic element: Al. J Phys Chem C 114:13477–13481
Ghosh S, Khan GG, Mandal K (2012) Defect-driven magnetism in luminescent n/p-type pristine and Gd-substituted SnO2 nanocrystalline thin films. Appl Mater Interfaces 4:2048–2056
Hong NH, Sakai J, Poirot N, Brizé V (2006) Room-temperature ferromagnetism observed in undoped semiconducting and insulating oxide thin films. Phys Rev B 73:132404
Hong NH, Poirot N, Sakai J (2008) Ferromagnetism observed in pristine SnO2 thin films. Phys Rev B 77:033205
Khan GG, Ghosh S, Mandal K (2012) Origin of room temperature d 0 ferromagnetism and characteristic photoluminescence in pristine SnO2 nanowires: A correlation. J Solid State Chem 186:278–282
Kilic C, Zunger A (2002) Origins of coexistence of conductivity and transparency in SnO2. Phys Rev Lett 88:095501
Lei M, Hu QR, Wang SL, Tang WH (2010) Structural and optical properties of Al-doped SnO2 nanowires. Mater Lett 64:19–21
Liu XJ, Zhu XY, Luo JT, Zeng F, Pan F (2009) Grain boundary defects-mediated room temperature ferromagnetism in Co-doped ZnO film. J Alloy Comp 482:224–228
Liu XF, Iqbal J, Wu ZB, He B, Yu RH (2010) Structure and room-temperature ferromagnetism of Zn-doped SnO2 nanorods prepared by solvothermal method. J Phys Chem C 11:4790–4796
Mishra D, Mandal BP, Mukherjee R, Naik R, Lawes G, Nadgorny B (2013) Oxygen vacancy enhanced room temperature magnetism in Al-doped MgO nanoparticles. Appl Phys Lett 102:182404
Rahman G, García-Suárez VM, Hong SC (2008) Vacancy-induced magnetism in SnO2: a density functional study. Phys Rev B 78:184404
Rahman G, Din NU, García-Suárez VM, Kan E (2013) Stabilizing intrinsic defects in SnO2. Phys Rev B 87:205205
Rani S, Roy SC, Karar N, Bhatnagar MC (2007) Structure, microstructure and photoluminescence properties of Fe doped SnO2 thin films. Solid State Commun 141:214–218
Sundaresan A, Bhargavi R, Rangarajan N, Siddesh U, Rao CNR (2006) Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides. Phys Rev B 74:161306
Urbach F (1953) The long-wavelength edge of photographic sensitivity and of the electronic absorption of solids. Phys Rev 92:1324
Volnianska O, Boguslawski P (2010) Magnetism of solids resulting from spin polarization of p orbitals. J Phys: Condens Matter 22:073202
Wang HX, Yan Y, Li K, Du XB, Lan ZH, Jin HM (2010) Role of intrinsic defects in ferromagnetism of SnO2: first-principles calculations. Phys Status Solidi B 247:444–448
Wang C, Wu Q, Ge HL, Shang T, Jiang JZ (2012) Magnetic stability of SnO2 nanosheets. Nanotechnology 23:075704
Wu P, Zhou BZ, Zhou W (2012) Room-temperature ferromagnetism in epitaxial Mg-doped SnO2 thin films. Appl Phys Lett 100:182405
Zhang L, Ge SH, Zuo YL, Wang J, Qi J (2011) Ferromagnetic properties in undoped and Cr-doped SnO2 nanowires. Scripta Mater 63:953–956
Zhou BZ, Wu P, Zhou W (2012) Tunable bandgap and ferromagnetism in sputtered epitaxial Sn1-x Mg x O2 thin films. Appl Phys Lett 101:182406
Zhou BZ, Zhou W, Wu P (2014) Effects of vacancy and lattice distortion on ferromagnetism in sputtered epitaxial Sn1-x K x O2 films. J Magn Magn Mater 355:230–234
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This work was supported by the National Natural Science Foundation of China (51074112, 11247224) and the Key Program of Tianjin Natural Science Foundation (11JCZDJC22100).
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Wang, J., Zhou, W. & Wu, P. Correlated room temperature ferromagnetism and photoluminescence in Al-doped SnO2 nanoparticles. J Nanopart Res 16, 2573 (2014). https://doi.org/10.1007/s11051-014-2573-1
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DOI: https://doi.org/10.1007/s11051-014-2573-1