Role of surface and subsurface defects in MgO thin film: XANES and magnetic investigations

Singh, Jitendra Pal; Chen, C.L.; Dong, Cunzheng; Prakash, Jai; Kabiraj, D.; Kanjilal, D.; Pong, W. F.; Asokan, K.

doi:10.1016/j.spmi.2014.10.035

Cited by 36 publications

(17 citation statements)

References 36 publications

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“…The magnetization (M) versus the applied magnetic field (H) curve of this film measured at room temperature is shown in Figure 7b. The behavior of the M-H curve is very similar to that already reported for MgO thin films of similar thickness [40,[50][51][52][53][54][55][56][57][58][59][60][61]. This behavior reveals the onset of d • ferromagnetism in this film.…”

Section: Magnetism Of Radio-frequency (Rf) Sputtered Mgosupporting

confidence: 86%

“…Apart from modified dielectric and optical behavior, RTFM in this material is also observed. Figure 3 shows the hysteresis curves of MgO thin films of thickness 8 (MgO-1) and 52 nm (MgO-2) at 300 K and 10 K [40]. These hysteresis curves reflect d • ferromagnetic behavior.…”

Section: Emerging Phenomena At Low Dimensionsmentioning

confidence: 98%

“…This shows Mg co-ordination to be almost the same, both at the surface and in the volume of the film. The measured O K-edge NEXAFS X-Ray Absorption Near Edge Structure (XANES) spectra [40,[90][91][92][93][94] of the film detected by TEY and TFY [95] modes are shown in Figure 8b. According to electronic structure calculation the spectral features B1, B2, B3, B 4 and B5 in the energy range of 80 eV above threshold arise from multiple scattering resonances in the energy of the excited The measured O K-edge NEXAFS spectra [40,[90][91][92][93][94] of the film detected by TEY and TFY [95] modes are shown in Figure 8b.…”

Section: Condens Matter 2017 2 36mentioning

confidence: 99%

“…The measured O K-edge NEXAFS X-Ray Absorption Near Edge Structure (XANES) spectra [40,[90][91][92][93][94] of the film detected by TEY and TFY [95] modes are shown in Figure 8b. According to electronic structure calculation the spectral features B1, B2, B3, B 4 and B5 in the energy range of 80 eV above threshold arise from multiple scattering resonances in the energy of the excited The measured O K-edge NEXAFS spectra [40,[90][91][92][93][94] of the film detected by TEY and TFY [95] modes are shown in Figure 8b. According to electronic structure calculation the spectral features B 1 , B 2 , B 3 , B 4 and B 5 in the energy range of 80 eV above threshold arise from multiple scattering resonances in the energy of the excited photoelectron in Mg and O states with p symmetry [40,90,92].…”

Section: Condens Matter 2017 2 36mentioning

confidence: 99%

“…According to electronic structure calculation the spectral features B1, B2, B3, B 4 and B5 in the energy range of 80 eV above threshold arise from multiple scattering resonances in the energy of the excited The measured O K-edge NEXAFS spectra [40,[90][91][92][93][94] of the film detected by TEY and TFY [95] modes are shown in Figure 8b. According to electronic structure calculation the spectral features B 1 , B 2 , B 3 , B 4 and B 5 in the energy range of 80 eV above threshold arise from multiple scattering resonances in the energy of the excited photoelectron in Mg and O states with p symmetry [40,90,92]. Rectangular region in Figure 8b shows pre-edge structures, which arises due to the excitation to the localized bound state and presence of surface state or intermixing [92,96] as it is common to occur in the NEXAFS spectra of metal oxides.…”

Section: Condens Matter 2017 2 36mentioning

confidence: 99%

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d° Ferromagnetism of Magnesium Oxide

Singh

Chae

2017

Condensed Matter

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Magnetism without d-orbital electrons seems to be unrealistic; however, recent observations of magnetism in non-magnetic oxides, such as ZnO, HfO 2 , and MgO, have opened new avenues in the field of magnetism. Magnetism exhibited by these oxides is known as d • ferromagnetism, as these oxides either have completely filled or unfilled d-/f-orbitals. This magnetism is believed to occur due to polarization induced by p-orbitals. Magnetic polarization in these oxides arises due to vacancies, the excitation of trapped spin in the triplet state. The presence of vacancies at the surface and subsurface also affects the magnetic behavior of these oxides. In the present review, origins of magnetism in magnesium oxide are discussed to obtain understanding of d • ferromagnetism.

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