Laser FIR magneto-spectroscopy of Zn1−1CrxSe

Krevet, R.; Twardowski, A.; Ortenberg, M. von; Mac, W.; Demianiuk, M.

doi:10.1016/0038-1098(93)90211-5

Cited by 13 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To obtain eigenstates and energies we generally follow the crystal field model developed by Vallin 24,25 and successfuly used for cubic Cr-DMS. 26,[29][30][31][32] We recall that the model takes into account tetrahedral crystal field, spin-orbit interaction, static tetragonal Jahn-Teller distortion and magnetic field. In the present case additionally the hexagonal crystal field has to be included.…”

Section: Magnetizationmentioning

confidence: 99%

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

Free-exciton magnetoreflectance and magnetization are used to study the p-d exchange interaction of Cd 1Ϫx Cr x S ͑xϭ0.0024, 0.0031, and 0.0033͒. Magnetization data are well described by a simple crystal-field model taking into account static, tetragonal Jahn-Teller distortion suffered by Cr 2ϩ ions, as well as the hexagonal crystal field of CdS. In effect, a strong magnetic anisotropy of a single Cr 2ϩ ion was found. From the heavy-hole exciton splitting, and the Cr 2ϩ ion spin deduced from magnetization data, the p-d exchange parameter was evaluated as N 0 ␤ϭϩ0.48Ϯ0.05 eV, using the previously obtained s-d exchange parameter: N 0 ␣ϭϩ0.22Ϯ0.01 eV. These exchange parameters provide a reasonable description of the exciton splittings for a magnetic field oriented along or perpendicularly to the crystal hexagonal axis.

show abstract

Section: Magnetizationmentioning

confidence: 99%

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

show abstract

“…The field dependence of the energy level spectra is quite well described by a simple crystal field model ( Fig. 2) [13,14].…”

Section: Cr Ion Energy Structurementioning

confidence: 90%

“…Recently far infrared laser experiments were performed for ZnCrSe [13] and ZnCrS [14] at high magnetic fields. The characteristic transitions for different Cr centres are well visible.…”

Section: Cr Ion Energy Structurementioning

confidence: 99%

Cr-Based II-VI Semimagnetic Semiconductors

Twardowski

1995

Acta Phys. Pol. A

Self Cite

View full text Add to dashboard Cite

We review the magnetic and optical properties of recently grown Cr--based II-VI semimagnetic semiconductors. We focus on two features of these materials which distinguish them from other semimagnetic semiconductors: the particular magnetic behaviour of these crystals, resulting from the Cr " ion energy structure determined by a strong, static Jahn-Teller effect, and a ferromagnetic p-d exchange interaction, which is unique for II-VI semimagnetic semiconductors.

show abstract

“…To describe the data we used a simple crystal field model proposed by Vallin et al [5], also used for ZnSe [3,6] and ZnS [7]. The Hamiltonian for d electrons of the Cr++ ion can be written as .…”

mentioning

confidence: 99%

High-Field EPR of Zn_1-xCr_xTe

et al. 1995

Self Cite

View full text Add to dashboard Cite

High magnetic field electron paramagnetic resonance experiments have been performed on Ζn1-xCrxTe covering the energy range 1-7 cm -1 in fields up to 20 T at T = 1.2 K. The static magnetic field was oriented along the (100), (110) and (111) crystallographic axes of the sample. Pronounced absorptioii lines for intra-chromium transitions have been observed for these different orientations, revealing a strong anisotropy due to a static Jahn-Teller distortion. The measured low energy level structure of the C r ++ ion can be described by a cubic crystal field model including this distortion of the Cr centers.PACS numbers: 75.50. Ppa, 76.30.Fc, 78.30.Fs Diluted magnetic semiconduction (DMS) or semimagnetic semiconduction (SMSC) are semiconductors (mostly II-VI) where a controlled fraction of the cations is randomly substituted by magnetic ions [1]. On the contrary to the well-known Mn, Fe and Co based DMS, the Cr based DMS are the first SMSC known so far with a ferromagnetic p-d exchange between the two coexisting electronic subsystems, the localized d-electrons of the Cr++ ion and the ZnTe band electrons [2]. From the magnetic point of view the Cr-SMSC have an intermediate character between that of a Brillouin-type paramagnet and a Van Vleck-type system. Moreover the Cr++ center in a tetrahedral crystal field undergoes a static Jahn-Teller distortion along one of the (100) axes of the crystal, which results in the existence of three types of nonequivalent Cr++ centers. This leads to pronounced anisotropy of the Cr++ ion energy level stucture and magnetic properties [3].To understand the low temperature magnetic properties of Zn1-x Crx Te, we need to know the exact low energy level stucture of the Cr++ ion. This energy diagram consists of five closely lying energy levels in the energy range between 0 and 8 cm -1 (ΔΕ N kBT, T = 4.2 K), with a complicated magnetic field dependence. A standard EPR setup typically operates at one fixed frequency between (829)

show abstract

Laser FIR magneto-spectroscopy of Zn1−1CrxSe

Cited by 13 publications

References 5 publications

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

Cr-Based II-VI Semimagnetic Semiconductors

High-Field EPR of Zn_1-xCr_xTe

Contact Info

Product

Resources

About

Laser FIR magneto-spectroscopy of Zn1−1CrxSe

Cited by 13 publications

References 5 publications

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxSHerbich1, Mac2, Twardowski3 et al. 1998Phys. Rev. BSelf Cite402171View full textAdd to dashboardCite

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxSHerbich1, Mac2, Twardowski3 et al. 1998Phys. Rev. BSelf Cite402171View full textAdd to dashboardCite

Cr-Based II-VI Semimagnetic Semiconductors

High-Field EPR of Zn1-xCrxTe

Contact Info

Product

Resources

About

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

Magnetization and exciton spectroscopy of the diluted magnetic semiconductorCd1−xCrxS
Herbich
¹
,
Mac
²
,
Twardowski
³

et al. 1998
Phys. Rev. B
Self Cite
40
2
17
1
View full text Add to dashboard Cite

High-Field EPR of Zn_1-xCr_xTe