Applicability of NMR to impurities detection in YIG thin films

Štěpánková, H.; Novák, P.; Englich, J.; Kohout, J.; Caspary, E.-G.; Kučera, Miroslav; Nitsch, K.; Gronckel, H. de

doi:10.1016/s0304-8853(98)00784-7

Cited by 8 publications

(2 citation statements)

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“…The most pronounced satellites are caused by a single substitution either of Fe 3+ in the nearest d-site by Ge4+, or of Fe$+ in the nearest α-site by Y3+ (intrinsic antisite defect), or of Y3+ in the nearest dodecahedral (c)-site by Ca2+. Assignment of the satellite lines was based on their intensity changes with the increasing Ge 4+-Ca2 + content, and on the previously identified satellites caused by the antisite defects and Cat+ substitution [1,3,5,6]. The interpretation of the satellite structure was confirmed by analysis of the NMR spectra measured in an external magnetic field.…”

Section: Resultsmentioning

confidence: 99%

Hyperfine Field in YIG with Charged Substitution

et al. 2000

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57 Fe NMR spectra were measured on thin films of yttrium iron garnet with divalent (Ca2+ ) and tetravalent (Ge 4 +) cation substitutions using the spin echo technique at 4.2 K. A series of Y3-x Cax Fe5 -x Gex O 12 samples with 0 < x < 0.05 was prepared by an epitaxial growth from ΒaΟ/Β 2 O 3 /ΒaF2 flux on gadolinium gałlium garnet substrate. Satellite lines corresponding to the iron ions having the Ge4 + and Ca2+ in their neighbourhood were identified. The sample with the germanium content of x(Ge) = 0.004 and (110) substrate orientation was used for a detailed study: NMR spectra of this sample were measured in an external magnetic field of 0.1 T applied along several directions in the plane of the film. The modification of the isotropic part and the anisotropy tensor of the hyperfine interaction caused by the Ge4 + substituent were obtained from the experimental data. The results were compared with those previously reported for trivalent substitution (G a3+)

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Section: Resultsmentioning

confidence: 99%

Hyperfine Field in YIG with Charged Substitution

et al. 2000

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“…The presence of such structural defect modifies locally the electronic structure, which reflects in a change of hyperfine interactions on neighbor nuclei and gives rise to characteristic shifts of their resonant frequencies. Moreover, the satellite spectral lines appearing in NMR spectra allow us to estimate the concentration of the defect from relative intensities of satellite lines with respect to their parent lines [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Antisite Defects in Epitaxial Films of Lutetium Doped Yttrium Iron Garnets Studied by Nuclear Magnetic Resonance

et al. 2010

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Series of lutetium doped yttrium iron garnet films is studied by means of 57 Fe nuclear magnetic resonance. Satellite spectral lines are resolved and identified in the spectra and concentrations of lutetium in dodecahedral sites as well as yttrium/lutetium antisite defects in octahedral sites are estimated. Compared to yttrium, lutetium cations are found to have stronger disposition towards creating the antisite defects.

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