Local Mn structure and room temperature ferromagnetism in Mn-doped In2O3 films

An, Yukai; Wang, Shiqi; Duan, Lingshen; Liu, Jiwen; Wu, Zhonghua

doi:10.1063/1.4808116

Cited by 49 publications

(27 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous results had found that oxygen vacancies and Fe 2+ ions were necessary for ferromagnetism to be observed in Fe-In 2 O 3 and these results are consistent with this earlier work [3,31,32]. This pattern was seen for all films and all oxygen content because it was found that both the saturation magnetisation and coercive field decreased with oxygen content whether the oxygen was in the target or in the PLD chamber.…”

Section: Magnetic Properties Of the Filmssupporting

confidence: 91%

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

et al. 2019

View full text Add to dashboard Cite

This paper concerns the importance of the preparation of the targets that may be used for pulsed laser deposition of iron-doped indium oxide films. Targets with a fixed concentration of iron are fabricated from indium oxide and iron metal or one of the oxides of iron, FeO, Fe3O4 and Fe2O3. Films from each target were ablated onto sapphire substrates at the same temperature under different oxygen pressures such that the thickness of the films was kept approximately constant. The films were studied using X-ray diffraction, X-ray absorption (both XANES and EXAFS), optical absorption and magnetic circular dichroism. The magnetic properties were measured with a SQUID magnetometer. At the lowest oxygen pressure, there was evidence that some of the iron ions in the films were in the state Fe2+, rather than Fe3+, and there was also a little metallic iron; these properties were accompanied by a substantial magnetisation. As the amount of the oxygen was increased, the number of defect phases and the saturation magnetisation was reduced and the band gap increased. In each case, we found that the amount of the oxygen that had been included in the target from the precursor added to the effect of adding oxygen in the deposition chamber. It was concluded that the amount of oxygen in the target due to the precursor was an important consideration but not a defining factor in the quality of the films.

show abstract

Section: Magnetic Properties Of the Filmssupporting

confidence: 91%

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The peak can be divided into two components (I and II). Peak II is usually associated with oxygen or oxygen‐related vacancies . The area of peak II was reduced from 19.18 to 15.3% after oxygen annealing, assuming the total area under the curve of O 1 s 100%.…”

Section: Resultsmentioning

confidence: 99%

Thermal annealing effect on β-Ga₂ O₃ thin film solar blind photodetector heteroepitaxially grown on sapphire substrate

Rafique

Han

Zhao

2017

Phys. Status Solidi A

View full text Add to dashboard Cite

This paper presents the effect of thermal annealing on β‐Ga2O3 thin film solar‐blind (SB) photodetector (PD) synthesized on c‐plane sapphire substrates by a low pressure chemical vapor deposition (LPCVD). The thin films were synthesized using high purity gallium (Ga) and oxygen (O2) as source precursors. The annealing was performed ex situ the under the oxygen atmosphere, which helped to reduce oxygen or oxygen‐related vacancies in the thin film. Metal/semiconductor/metal (MSM) type photodetectors were fabricated using both the as‐grown and annealed films. The PDs fabricated on the annealed films had lower dark current, higher photoresponse and improved rejection ratio (R250/R370 and R250/R405) compared to the ones fabricated on the as‐grown films. These improved PD performances are due to the significant reduction of the photo‐generated carriers trapped by oxygen or oxygen‐related vacancies.

show abstract

“…The exchange interaction would then have been through an electron trapped at the oxygen vacancy site, V o [24]. The M1– V o –M2 interaction [25] is generally ferromagnetic in the case of Fe 3+ – V o –Fe 3+ [24]. In the case of Fe 2+ – V o –Fe 2+ , it is weaker but still ferromagnetic.…”

Section: Resultsmentioning

confidence: 99%

Cu _{1–
x} Fe _x O: hopping transport and ferromagnetism

et al. 2017

View full text Add to dashboard Cite

Single phase, sol–gel prepared Cu1–xFexO (0 ≤ x ≤ 0.125) powders are characterized in terms of structural, electronic and magnetic properties. Using dielectric and magnetic studies we investigate the coupling of electron and spin. The electrical conductivities and activation energies are studied with increasing Fe content. Modelling of experimental conductivity data emphasizes a single hopping mechanism for all samples except x = 0.125, which have two activation energies. Hole doping is confirmed by confirming a majority Fe3+ substitution of Cu2+ in CuO from X-ray photoelectron spectroscopy studies (XPS). Such a substitution results in stabilized ferromagnetism. Fe substitution introduces variation in coercivity as an intrinsic magnetic property in Fe-doped CuO, and not as a secondary impurity phase.

show abstract

Local Mn structure and room temperature ferromagnetism in Mn-doped In2O3 films

Cited by 49 publications

References 38 publications

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

Thermal annealing effect on β-Ga₂ O₃ thin film solar blind photodetector heteroepitaxially grown on sapphire substrate

Cu _{1–
x} Fe _x O: hopping transport and ferromagnetism

Contact Info

Product

Resources

About

Local Mn structure and room temperature ferromagnetism in Mn-doped In2O3 films

Cited by 49 publications

References 38 publications

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide

Thermal annealing effect on β-Ga2 O3 thin film solar blind photodetector heteroepitaxially grown on sapphire substrate

Cu 1– x Fe x O: hopping transport and ferromagnetism

Contact Info

Product

Resources

About

Thermal annealing effect on β-Ga₂ O₃ thin film solar blind photodetector heteroepitaxially grown on sapphire substrate

Cu _{1–
x} Fe _x O: hopping transport and ferromagnetism