Room temperature ferromagnetism in Co-doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>films on Si(001)

Fernandes, V.; Klein, J. J.; Mattoso, N.; Mosca, D. H.; Silveira, Eduardo; Ribeiro, E.; Schreiner, W. H.; Varalda, J.; Oliveira, A. J. A. de

doi:10.1103/physrevb.75.121304

Cited by 63 publications

(37 citation statements)

References 25 publications

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“…RTFM could be observed for the CeO 2 samples. The values of saturation magnetization (M s ) are 0.082 emu/g, 0.08 emu/g, 0.116 emu/g, 0.084 emu/g, 0.134 emu/g, [10,44], and comparable to those previous reports in which the CeO 2 NPs were doped with magnetic element, such as Co and Ni [9,45,46]. Fig.…”

Section: Intensity (Au)supporting

confidence: 84%

“…Ferromagnetism (FM) in diluted magnetic oxides has attracted considerable interest due to the potential application for spintronics with room temperature functionality. In addition the magnetic doping effect can lead to RTFM [9], there have been several reports on pure CeO 2 exhibiting FM at room temperature [10][11][12]. Oxygen vacancies [13,14] have been proposed to play an important role in the magnetic origin for oxide.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen vacancy and Ce3+ ion dependent magnetism of monocrystal CeO2 nanopoles synthesized by a facile hydrothermal method

Wang

Meng

2013

Materials Research Bulletin

151

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Section: Intensity (Au)supporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Oxygen vacancy and Ce3+ ion dependent magnetism of monocrystal CeO2 nanopoles synthesized by a facile hydrothermal method

Wang

Meng

2013

Materials Research Bulletin

151

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“…Recently, TM-doped CeO 2 has been also reported to exhibit ferromagnetism at and above room temperature [5][6][7][8][9][10][11]. Unlike other O-DMSs, CeO 2 has a cubic structure with lattice parameter a = 0.54113 nm [12] that will facilitate the integration of spintronic devices with advanced silicon microelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Structure and Magnetic Properties of Monodisperse Fe3+-doped CeO2 Nanospheres

2013

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Abstract:This work reports the study concerning the structure and magnetic properties of undoped CeO2 and Fe-doped CeO2 (Ce1−xFexO2, 0.01 ≤ x ≤ 0.07) nanospheres with diameters of 100∼200 nm prepared by hydrothermal method using polyvinylpyrrolidone (PVP) as surfactant. The prepared samples were studied by using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray absorption near-edge structure (XANES), and vibrating sample magnetometry (VSM). The XRD results showed that Fe-doped CeO2 was single-phased with a cubic structure, and with Fe 3+ successfully substituting in Ce 4+ sites. Raman spectra showed a redshift of F2g mode that caused by the Fe doping. The samples of both undoped CeO2 and Fe-doped CeO2 exhibited room temperature ferromagnetism, and the saturated magnetization (Ms) increased with increasing Fe content until x = 0.05, and then the samples displayed ferromagnetic loops as well as paramagnetic behavior. The roles of Ce 3+ and Fe 3+ spin electrons are discussed for the ferromagnetism in the Fe-doped CeO2.

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“…Furthermore, it was shown that doping CeO 2 with a small amount of Co generates films with high Curie temperature and giant magnetic moment, which can be explored in the emergent field of spintronics [9]. A recent, surprising finding regarding this material is the observation of permanent magnetic moment without any magnetic ions doping [10,11]. Thus, fabricating good quality thick films of this material is of utmost importance for both basic and applied physics.…”

Section: Introductionmentioning

confidence: 95%

Low-defect CeO2 films synthesis by combined spray pyrolysis using different precursors

et al. 2014

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CeO 2 films were fabricated by combining both a modified spray pyrolysis and the vapour transport deposition techniques. Two different precursors, cerium chloride and cerium acetate, were explored. In our approach, the pyrolytic process was not concomitant with the spray deposition and the introduction of the vapour transport condition has showed to improve both the morphological and optical quality of the films. Samples obtained from cerium chloride show a porous morphology, usual for polycrystalline CeO 2 layers, and a homogeneous light emission. When using vapour transport during thermal treatment, we achieved an enhanced luminescence, blue shifted to 3.08 eV and with negligible presence of defect bands. Films obtained from cerium acetate present similar crystalline properties, and a more defined light emission line shape, also peaked at 3.08 eV but with even lower contribution from known green-red defect bands. These results show that the proposed combined technique leads to CeO 2 films with homogeneous, enhanced optical properties.

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Room temperature ferromagnetism in Co-dopedCeO2films on Si(001)

Cited by 63 publications

References 25 publications

Oxygen vacancy and Ce3+ ion dependent magnetism of monocrystal CeO2 nanopoles synthesized by a facile hydrothermal method

Oxygen vacancy and Ce3+ ion dependent magnetism of monocrystal CeO2 nanopoles synthesized by a facile hydrothermal method

Structure and Magnetic Properties of Monodisperse Fe3+-doped CeO2 Nanospheres

Low-defect CeO2 films synthesis by combined spray pyrolysis using different precursors

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