scholarly journals Role of oxygen vacancies in room-temperature ferromagnetism in cobalt-substitutedSrTiO3

2014 ◽  
Vol 90 (12) ◽  
Author(s):  
Chandrima Mitra ◽  
Chungwei Lin ◽  
Agham B. Posadas ◽  
Alexander A. Demkov
Keyword(s):  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism

Significant room-temperature ferromagnetism in porous ZnO films: The role of oxygen vacancies

2015 ◽  
Vol 200 ◽  
pp. 22-27 ◽  
Author(s):  
Xue Hou ◽  
Huiyuan Liu ◽  
Huiyuan Sun ◽  
Lihu Liu ◽  
Xiaoxuan Jia
Keyword(s):  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism ◽  
Zno Films

Role of multivalent Cu, oxygen vacancies and CuO nanophase in the ferromagnetic properties of ZnO:Cu thin films

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 55648-55657 ◽  
Author(s):  
M. Younas ◽  
Junying Shen ◽  
Mingquan He ◽  
R. Lortz ◽  
Fahad Azad ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism ◽  
Simultaneous Presence ◽  
Ferromagnetic Properties

Room temperature ferromagnetism (FM) of these thin film samples are highly tuneable by the simultaneous presence of CuO nanophases and multivalent Cu and Vö concentrations.

scholarly journals Role of vanadium ions, oxygen vacancies, and interstitial zinc in room temperature ferromagnetism on ZnO-V2O5 nanoparticles

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Sion F Olive-Méndez ◽  
Carlos R Santillán-Rodríguez ◽  
Ricardo A González-Valenzuela ◽  
Francisco Espinosa-Magaña ◽  
José A Matutes-Aquino
Keyword(s):  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism ◽  
Interstitial Zinc ◽  
Vanadium Ions

Role of non-magnetic dopants on the room temperature ferromagnetism and optical properties of BaSnO3 perovskite

2020 ◽  
Vol 281 ◽  
pp. 121028 ◽  
Author(s):  
Saad Mabrouk Yakout ◽  
Hanan A. Mousa ◽  
Hala T. Handal ◽  
Walid Sharmoukh
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism

Role of dopant, defect, and host oxide in the observed room temperature ferromagnetism: Co–ZnO versus Co–CeO2

2009 ◽  
Vol 105 (7) ◽  
pp. 07C515 ◽  
Author(s):  
Lubna R. Shah ◽  
Weigang Wang ◽  
Hao Zhu ◽  
Bakhtyar Ali ◽  
Y. Q. Song ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism

scholarly journals Studies on Structural and Morphological Properties of Multidoped Ceria Ce0.8Nd0.0025Sm0.0025Gd0.005Dy0.095Y0.095O2-δ(x=0.2) as Solid Solutions

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Marija Stojmenović ◽  
Maja C. Pagnacco ◽  
Vladimir Dodevski ◽  
Jelena Gulicovski ◽  
Milan Žunić ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Solid Solutions ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism ◽  
Fluorite Structure ◽  
Lattice Parameter ◽  
Morphological Properties ◽  
Fluorite Type ◽  
Potential Improvement

The nanopowdery solid solutions of multidoped ceria Ce0.8Nd0.0025Sm0.0025Gd0.005Dy0.095Y0.095O2-δ(x=0.2) with the fluorite type crystal structure of CeO2were synthesized for the first time. Two synthesis procedures were applied: the modified glycine-nitrate procedure (MGNP method) and room temperature self-propagating reaction (SPRT method). All nanopowders were characterized by XRPD analysis, Raman spectroscopy, low temperature nitrogen physisorption, TEM, and SEM methods. According to the XRPD and Raman spectroscopy results, single phase solid solutions of fluorite structure were evidenced regardless of the number of dopants and synthesis procedure. Both XRPD and TEM were analyses evidenced nanometer particle dimensions. The SPRT method results in obtaining sample with higher specific surface area, smaller crystallite and particles sizes, and the same values of the lattice parameter in comparison to pure CeO2. Raman spectroscopy was confirmed to the oxygen vacancies introduced into the ceria lattice when Ce4+ions were replaced with cations (dopants) of lower valence state (3+), which may indicate the potential improvement of ionic conductivity. Additionally, the presence of oxygen vacancies in the lattice ceria, as well as very developed grain boundaries, gives a new possibility for potential application of obtained nanopowders in the area of room temperature ferromagnetism as spintronics.

Room-Temperature Ferromagnetism in Co-Doped SrTiO3 Nanofibres

2012 ◽  
Vol 512-515 ◽  
pp. 1438-1441
Author(s):  
Wei Zhang ◽  
He Ping Li ◽  
Wei Pan
Keyword(s):  
Room Temperature ◽  
Oxygen Vacancies ◽  
Room Temperature Ferromagnetism ◽  
Sol Gel ◽  
Magnetic Ordering ◽  
Second Phase ◽  
Co Doped

In this article, Co-doped SrTiO3 nanofibres have been prepared by electrospinning from a sol-gel precursor and the following calcination at 923K. XRD results confirmed that no second phase was formed, and Co ions successfully occupied the Ti sites. By annealing in hydrogen, oxygen vacancies and (Co-H-Co) were formed, which both contributed to the magnetic ordering in SrTi1-xCoxO3 nanofibres are at 300K.

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