Optical Properties of Single-Crystal Films of Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Berger, S. B.; Ekström, Lars‐Gösta

doi:10.1103/physrevlett.23.1499

Cited by 62 publications

(18 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the Type II materials, their optical properties have a feature such that the crystal field transitions in the Cr3+ ions appear below the fundamental absorption band edge [4]. In CdCr,S4, besides these crystal field transitions, the observation of a prominant red shift peak in the absorption band edge has been reported by Berger and Ekstrom [3], who have called this peak the C-peak.…”

mentioning

confidence: 91%

“…-Now we will show that the observed features of the C-peak mentioned before can be explained by this assignment. 3.1 Since the a, orbital is composed of both the Cd 5s and Cr e, orbitals while the e orbitals is formed from only the Cr e, orbitals, the decrease in the energy of the a , orbital by HCl is smaller than that in the e orbital. Thus the transition energy from a , to e orbital below Tc is smaller than that above To, E,.…”

Section: The Classijication Of the N?olecular Orbitals By The Irreducmentioning

confidence: 99%

“…Namely, the peak appears only for the right circularly polarized light (177 = + I) in the Faraday configura--tion in which the light propagates along the magnetic field [3].…”

mentioning

confidence: 99%

“…4) The.flvalue of the peak is about [3]. 5) The peak is sensitive to doping and sample stoichiometry [3].…”

mentioning

confidence: 99%

“…These crystals are classified into two types, Typed I or Type 11, according as their energy gaps are smaller or larger than the strength of the cubic crystal field for the Cr3+ ions at the B sites. For example, CdCr2Se, [I] and HgCr,Se4 [2] belong to the former while CdCr,S4 [3] belong to the latter. In the Type II materials, their optical properties have a feature such that the crystal field transitions in the Cr3+ ions appear below the fundamental absorption band edge [4].…”

mentioning

confidence: 99%

See 4 more Smart Citations

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Kamimura

Natsume

1973

J. Phys. Colloques

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 91%

Section: The Classijication Of the N?olecular Orbitals By The Irreducmentioning

confidence: 99%

“…Namely, the peak appears only for the right circularly polarized light (177 = + I) in the Faraday configura--tion in which the light propagates along the magnetic field [3].…”

mentioning

confidence: 99%

“…4) The.flvalue of the peak is about [3]. 5) The peak is sensitive to doping and sample stoichiometry [3].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Kamimura

Natsume

1973

J. Phys. Colloques

View full text Add to dashboard Cite

show abstract

Magnetic-order-induced band splitting in the thermomodulation spectra of the ferromagnetic semiconductor CdCr2Se4

Stoyanov

Iliev

Stoyanova

1975

Phys. Stat. Sol. (a)

View full text Add to dashboard Cite

Diffuse reflectance, diffuse thermoreflectance (DTR), and specular thermoreflectance (TR) of the ferromagnetic semiconductor CdCr2Se4 are measured in the region of photon energies from 1.2 to 3.3 eV, between 95 and 320 °K. The TR spectra clearly show that a magnetic‐order‐induced band splitting appears below the Curie‐Weiss temperature θc ≈200 °K. The results are consistent with the theory of spin‐polarized bands and explain unambigously the anomalous behaviour of the absorption edge in the ferromagnetic semiconductors. A simple model is proposed for the optical band‐to‐band transitions in CdCr2Se4.

show abstract

The magneto‐optic Kerr effect and Faraday rotation of CdCr₂S₄ for radiation between 0.1 and 4 eV

Wittekoek

Rinzema

1971

Physica Status Solidi (b)

View full text Add to dashboard Cite

The complex polar Kerr effect (rotation and ellipticity) of CdCr,S4 has been measured between 1.6 and 4 eV a t temperatures between T, = 84 and 6 OK. Four well separated magneto-optical transitions have been identified. Two sharp peaks a t 2.12 and 2.29 eV are attributed to the Cld+ crystal field transitions 4A, -+ ,T, and 'A, + 4T1, respectively.Crystal field parameters satisfying the optical data have been derived. Only one transition at 1.9 eV shows a magnetic red-shift. It depends on sample-stoichiometry and doping. The strongest resonance is found a t 3.4 eV and is assigned to a charge transfer transition of an electron from a p-orbital of sulphur to a chromium orbital. The Faraday rotation in the infrared region is also reported and shown to be caused by the charge transfer transition at 3.4 eV.Der komplexe polare Ken-Effekt (Rotation aund Elliptizitit) wurde an CdCr,S, zwischen 1,6 und 4 eV im Temperaturgebiet von T, = 84 bis 6 "K gemessen. Vier gut unterscheidbare magneto-optische ffbergiinge konnten identifiziert werden. Zwei scharfe Maxima bei 2,12 bzw. 2,29 eV werden den Kristallfeldubergiingen, 4A, + ,T, bzw. 4A2 + 4T1, des CrS+-Ions zugeordnet. Die Kristallfeldparameter, die mit optischen Angaben gut ubereinstimmen, werden bestimmt. Nur ein ubergang bei 1,9 eV zeigt die Rotverschiebung der magnetischen Halbleiter. Diese ist von der Stochiometrie und von der Dotierung abhiingig. Ein starker ubergang bei 3,4 eV kann einem elektronischen ubergang von einer p-Bahn des Schwefels nach einer d-Bahn des Chroma zugeschrieben werden. Es wird nachgewiesen, daD dieser "charge transfer"-ubergang die Ursache der Paraday-Rotation ist die im ihfrarot.en Spektralgebiet gemessen wurde.

show abstract

Optical Properties of Single-Crystal Films of CdCr2S4

Cited by 62 publications

References 12 publications

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Magnetic-order-induced band splitting in the thermomodulation spectra of the ferromagnetic semiconductor CdCr2Se4

The magneto‐optic Kerr effect and Faraday rotation of CdCr₂S₄ for radiation between 0.1 and 4 eV

Contact Info

Product

Resources

About

Optical Properties of Single-Crystal Films of CdCr2S4

Cited by 62 publications

References 12 publications

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Magnetic F Center in Chalcogenide Spinel Type Ferromagnetic Divalent Ionic Crystals

Magnetic-order-induced band splitting in the thermomodulation spectra of the ferromagnetic semiconductor CdCr2Se4

The magneto‐optic Kerr effect and Faraday rotation of CdCr2S4 for radiation between 0.1 and 4 eV

Contact Info

Product

Resources

About

The magneto‐optic Kerr effect and Faraday rotation of CdCr₂S₄ for radiation between 0.1 and 4 eV