Ferromagnetism on a paramagnetic host background: the case of rutile TM:TiO2 single crystals (TM = Cr, Mn, Fe, Co, Ni, Cu)

Single crystals of TiO2 rutile doped with Cr, Mn, Fe, Co, Ni, and Cu were grown with the flux method in a Na2B4O7 melt. The samples, checked in their structural and phase homogeneity by x-ray diffraction and micro-Raman spectroscopy, were single-phase needle-shaped crystals several millimetres long....

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Published inJournal of physics. Condensed matter Vol. 18; no. 32; pp. 7643 - 7650
Main Authors Sangaletti, L, Mozzati, M C, Galinetto, P, Azzoni, C B, Speghini, A, Bettinelli, M, Calestani, G
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 16.08.2006
Institute of Physics
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Magnetic properties and materials
Nonmetallic ferromagnetic materials
Nonmetals
Physics
Studies of specific magnetic materials
Titanium oxides
Raman spectra
Impurities
Transition element additions
Doping
Paramagnetic materials
Paramagnetism
Ferromagnetism
XRD
Crystal growth from melts
Magnetic properties
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Summary:Single crystals of TiO2 rutile doped with Cr, Mn, Fe, Co, Ni, and Cu were grown with the flux method in a Na2B4O7 melt. The samples, checked in their structural and phase homogeneity by x-ray diffraction and micro-Raman spectroscopy, were single-phase needle-shaped crystals several millimetres long. Paramagnetic and ferromagnetic behaviours at room temperature were observed and they are discussed also in connection with the magnetic properties of undoped TiO2 crystals.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/18/32/012