Hyperfine interaction in polycrystalline paramagnetic ytterbium oxide studied by the Mössbauer effect

Plingen, K.-G.; Wolbeck, B.; Schröder, Franziska

doi:10.1016/0375-9474(71)90151-5

Cited by 20 publications

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References 15 publications

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“…Since it is known that for these probes the EFG has strong variation with temperature (T ), 8,58,59 we will compare our APW + lo results with those coming from low T measurements. [49][50][51][52][53][54][55] For Gd 2 O 3 , Dy 2 O 3 , and Tm 2 O 3 , Mössbauer measurements were carried out using 155 Gd, 161 Dy, and 169 Tm as probes. In the cases of Gd 2 O 3 and Tm 2 O 3 , due to the nuclear spin of the sensitive states of 155 Gd and 169 Tm (I = 3/2), the result of the Mössbauer experiments for each interaction is the quadrupole splitting E Q .…”

Section: A Pure Ln 2 Omentioning

confidence: 99%

“…Yb 2 O 3 is the bixbyite most deeply studied experimentally. EFG measurements at its cationic sites, both by MS, 53,54 using 170 Yb, 171 Yb, 172 Yb, and 174 Yb as probes, and by PAC spectroscopy, 55 with 172 Yb as probe, yield similar results: one interaction characterized by |V zz | on the order of 32 × 10 21 V/m 2 and an η value on the order of 0.1 and a second interaction characterized by |V zz | = 12−15 × 10 21 V/m 2 and η = 0.45-0.65 (Table II). In these MS experiments, it is possible to determine, in addition to the magnitude and symmetry of the EFG, the sign of V zz (Ref.…”

Section: A Pure Ln 2 Omentioning

confidence: 99%

“…In these MS experiments, it is possible to determine, in addition to the magnitude and symmetry of the EFG, the sign of V zz (Ref. 62), which turns out to be negative for both sites 53 (Table II). These experimental results for Yb 2 O 3 follow the trend observed in other bixbyites.…”

Section: A Pure Ln 2 Omentioning

confidence: 99%

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AbinitioLSDA and LSDA+Ustudy of pure and Cd-doped cubic lanthanide sesquioxides

et al. 2013

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The electronic, structural, and hyperfine properties of pure and Cd-doped lanthanide (Ln) sesquioxides with the cubic bixbyite structure (Ln 2 O 3 , Ln ranging from La to Lu) have been studied using the full-potential augmented plane wave plus local orbital (APW + lo) method within the local spin density approximation (LSDA) and the Coulomb-corrected LSDA + U . In the case of the pure systems, our calculations show that LSDA + U gives a better representation of the band structure compared to LSDA. The predicted equilibrium structures and the electric field gradient (EFG) tensor at Ln sites were calculated and compared with those obtained by means of hyperfine techniques and with theoretical results obtained in In 2 O 3 , Sc 2 O 3 , and Lu 2 O 3 reported in the literature. The origin of the EFG at Ln sites and the role played by the 4f electrons on this quantity are discussed. In the case of the Cd-doped systems, the APW + lo method (also within LSDA and LSDA + U ) was applied to treat the electronic structure of the doped system. The role of the Ln 4f electrons on the EFG at Cd impurity sites, and other variables like structural distortions induced by the Cd impurity, were investigated in detail and are discussed and compared with available experimental results. An excellent agreement between the experimental and calculated EFGs was found for all Cd-doped systems.

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