Bound magnetic polaron evidence in EuO

Lascaray, J. P.; Desfours, J.P.; Avérous, M.

doi:10.1016/0038-1098(76)91103-0

Cited by 26 publications

(13 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Discussion. -The energy positions of the dips in our reflectivity spectra or in absorption spectra [6,9] at 1.85 and 2.20 ym and T > 50 K are consistent with both distinct interpretations found in the literature [4,6]. We have found that the location of these structures only slightly shifts in energy, in agreement with references [6] and [9].…”

supporting

confidence: 80%

“…We have found that the location of these structures only slightly shifts in energy, in agreement with references [6] and [9]. Lascaray et al [9] have asserted that it was an evidence for the validity of the interpretation of reference [4], according to which the structures are the result of an exchange resonance of the outer electron of the vacancy in a bound magnetic polaron. This assertion was rejected by Helten et al [6], who argued that any optical transition due to a F+ centre has the same property.…”

supporting

confidence: 76%

“…This is in good agreement with the shift of the two absorption peaks with temperature in other Eu rich EuO single crystals [6,9]. It is important to notice that the magnitude of the dips is very small, like that of the absorption peaks on the more Eu rich samples [6].…”

supporting

confidence: 73%

“…-The energy positions of the dips in our reflectivity spectra or in absorption spectra [6,9] at 1.85 and 2.20 ym and T > 50 K are consistent with both distinct interpretations found in the literature [4,6]. We have found that the location of these structures only slightly shifts in energy, in agreement with references [6] and [9]. Lascaray et al [9] have asserted that it was an evidence for the validity of the interpretation of reference [4], according to which the structures are the result of an exchange resonance of the outer electron of the vacancy in a bound magnetic polaron.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Reflectivity spectra of Eu rich EuO near the absorption edge

Escorne¹,

Mauger²,

Godart³

et al. 1979

J. Phys. France

View full text Add to dashboard Cite

show abstract

supporting

confidence: 80%

supporting

confidence: 76%

supporting

confidence: 73%

mentioning

confidence: 99%

See 2 more Smart Citations

Reflectivity spectra of Eu rich EuO near the absorption edge

Escorne¹,

Mauger²,

Godart³

et al. 1979

J. Phys. France

View full text Add to dashboard Cite

show abstract

“…Experimental evidence for the presence of magnetic polarons has been shown in Raman scattering, 39 muon spin relaxation, 40 optical absorption, 41 and NMR 42 studies.…”

Section: Resultsmentioning

confidence: 99%

Antiferromagnetic coupling in EuO1−x

2012

View full text Add to dashboard Cite

The mechanism for the ferromagnetic order in oxygen-deficient europium monoxide EuO 1-x at temperatures higher than 69 K (the Curie temperature Tc of stoichiometric EuO) remains controversial. We have investigated the magnetization of EuO 1-x thin films prepared via pulsed laser deposition as a function of temperature and applied field. The ferromagnetic ordering above 69 K originates from the exchange coupling between the doped electrons and Eu 4f moments and is described using a magnetic polaron model. Our data show that the magnetic polarons are coupled antiferromagnetically to the Eu 4f local moments that dominate the magnetization below 69 K. The magnetic polaron state is stable below 69 K and seems to persist down to a relatively low temperature. An explanation is given to account for the antiferromagnetic coupling. We also describe the evolution of the phases of the magnetic orders as the temperature is varied in EuO 1-x .2

show abstract

Electronic Properties of W’ Twin Walls in Ferroelastic BiVO₄

Xu,

Sharma,

Wen

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Topological defects in ferroic materials can exhibit intrinsic properties that differ from the bulk. Here， structural and electronic variations of non‐prominent (W’) ferroelastic twin domain walls are investigated in BiVO4, a widely investigated photocatalytic material. Using aberration‐corrected scanning transmission electron microscopy (STEM), a kink configuration of the sharp ferroelastic twin wall with an altered electronic structure is revealed. Nanoscale conductivity measurements by conductive atomic force microscopy (c‐AFM) show higher conductivity at twin walls compared to non‐conductive bulk domains. Electronic structure investigation by electron energy loss spectroscopy (EELS) shows a higher density of oxygen vacancies and possible polaron accumulation at the wall. These findings reveal the electronic properties of BiVO4 domain walls, which are interesting for nanoscale‐engineered catalytic concepts of BiVO4 and materials design for photochemistry‐relevant applications.

show abstract

Bound magnetic polaron evidence in EuO

Cited by 26 publications

References 7 publications

Reflectivity spectra of Eu rich EuO near the absorption edge

Reflectivity spectra of Eu rich EuO near the absorption edge

Antiferromagnetic coupling in EuO1−x

Electronic Properties of W’ Twin Walls in Ferroelastic BiVO₄

Contact Info

Product

Resources

About

Bound magnetic polaron evidence in EuO

Cited by 26 publications

References 7 publications

Reflectivity spectra of Eu rich EuO near the absorption edge

Reflectivity spectra of Eu rich EuO near the absorption edge

Antiferromagnetic coupling in EuO1−x

Electronic Properties of W’ Twin Walls in Ferroelastic BiVO4

Contact Info

Product

Resources

About

Electronic Properties of W’ Twin Walls in Ferroelastic BiVO₄