Chromium-doped CdF2 crystals by ESR spectroscopy

Jabłoński, R.; Domańska, M.; Krukowska-Fulde, B.; Niemyski, T.

doi:10.1016/0025-5408(73)90069-x

Cited by 11 publications

(6 citation statements)

References 6 publications

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“…We have measured the EPR spectra of SrCl 2 :Cr and BaF 2 :Cr crystals at 9.3 GHz (X-band) and 34.0 GHz (Q-band) as functions of the angle between the crystallographic axes and the external magnetic field B. In contrast to the case for the semiconductors CdF 2 , SrF 2 and CaF 2 , where the unperturbed Cr 2+ EPR signals decrease below detection limits at temperatures above 40 K [1][2][3][4]8], measurements could be performed on BaF 2 up to 200 K and on SrCl 2 up to 300 K.…”

Section: Experimental Results and Interpretationmentioning

confidence: 95%

“…Figure 1 shows the angular dependence for the (001) plane of the Q-band spectrum measured at 85 K. This dependence clearly corresponds to a spin system with tetragonal symmetry. The resonances detected in this plane, labelled in the figure by The experimental resonance positions of the rotational diagram (crosses in figure 1) have been explained using the SH of equation (1). The dashed lines show the transition 1) and the parameters given in table 1.…”

Section: Srcl 2 :Cr 2+mentioning

confidence: 99%

“…Continuous-wave (cw) and pulsed EPR studies of divalent chromium in CdF 2 [1], SrF 2 [2] and CaF 2 [3] have been recently reported. Alkaline-earth halides have matrices which can be used to study ions in eightfold cubic coordination.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An electron paramagnetic resonance study of the tetragonally distorted ion in and

Oliete¹,

Orera²,

Alonso³

1996

J. Phys.: Condens. Matter

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Chromium-doped [Formula: see text] and [Formula: see text] have been studied by both EPR and ENDOR spectroscopy. [Formula: see text] ions enter the fluorite structure in distorted substitution cation sites. In both matrices the distortion observed is tetragonal. X- and Q-band EPR measurements at temperatures between 4 and 300 K allowed us to determine the ion symmetry and the following spin-Hamiltonian parameters: [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] for [Formula: see text]; and [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] for [Formula: see text]. For [Formula: see text], the weak superhyperfine interaction of [Formula: see text] with the surrounding [Formula: see text] ions has been studied by both EPR and ENDOR techniques for [Formula: see text]. No ENDOR signals were detected for [Formula: see text]. The results are tentatively explained in terms of a Jahn - Teller effect corresponding to [Formula: see text] coupling strongly stabilized by lattice stresses, although other possible origins for the distortion cannot be completely ruled out.

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Section: Experimental Results and Interpretationmentioning

confidence: 95%

Section: Srcl 2 :Cr 2+mentioning

confidence: 99%

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An electron paramagnetic resonance study of the tetragonally distorted ion in and

Oliete¹,

Orera²,

Alonso³

1996

J. Phys.: Condens. Matter

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“…For hosts with a greater lattice parameter the coupling to the vibration modes is weaker and the ion, taking into account the available site, is displaced out of the centre to bond to the ligands in near-squared planar structures. Cue ' (0.72 A) orth [14] orth [14] tetrag [15] tetrag [16] tetrag [17] Cr2 (0.89 A) orth [1] orth [2] orth [3] tetrag [14, t.w.] tetrag [14, t.w.]…”

Section: Discussionmentioning

confidence: 99%

“…Divalent chromium in alkaline-earth halides (CdF 2 [1], CaF2 [2], SrF2 [3], BaF2 [4] and SrClz [4]) has been recently studied using both continuous wave and pulsed electron paramagnetic resonance (EPR) techniques. In all these matrices Cr 2 + ion enters substitutionally into an eightfold cubic coordination cation lattice.…”

Section: Introductionmentioning

confidence: 99%

Tetragonally distorted Cr2+ ions in BaF2 and SrCl2 studied by ESEEM spectroscopy

1998

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Electron spin echoes on tetragonally distorted non-Kramers Crz+ ions in chromium doped BaF, and SrCl 2 single crystals have been observed. The superhyperfine interaction (shf) with the nearest halide ions has been studied using the electron spin echo envelope modulation (ESEEM) signal. For Cr2 in BaF2 the nearest coordination shell consists of four equivalent fluorine ions in a plane perpendicular to the defect tetragonal axis, the Cr2 + ion being off-centre displaced towards the fluorine plane. The Cr2 ' shf tensor for BaF 2 has been determined. For SrCl2 :Cr ESEEM signals associated to the shf interaction with nearest chloride ions were observed but the measurements did not allow us to give a definitive defect model in this case.

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CdF₂: Cr²⁺ ‐ an example for an orthorhombic Jahn‐Teller distortion

Ulrici¹

1977

Physica Status Solidi (b)

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Chromium-doped CdF2 crystals by ESR spectroscopy

Cited by 11 publications

References 6 publications

An electron paramagnetic resonance study of the tetragonally distorted ion in and

An electron paramagnetic resonance study of the tetragonally distorted ion in and

Tetragonally distorted Cr2+ ions in BaF2 and SrCl2 studied by ESEEM spectroscopy

CdF₂: Cr²⁺ ‐ an example for an orthorhombic Jahn‐Teller distortion

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Chromium-doped CdF2 crystals by ESR spectroscopy

Cited by 11 publications

References 6 publications

An electron paramagnetic resonance study of the tetragonally distorted ion in and

An electron paramagnetic resonance study of the tetragonally distorted ion in and

Tetragonally distorted Cr2+ ions in BaF2 and SrCl2 studied by ESEEM spectroscopy

CdF2: Cr2+ ‐ an example for an orthorhombic Jahn‐Teller distortion

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CdF₂: Cr²⁺ ‐ an example for an orthorhombic Jahn‐Teller distortion