The lattice position of Fe in Fe-doped LiNbO<sub>3</sub>

Gog, T.; Schotters, P.; Falta, J.; Materlik, G.; Grodzicki, Michael

doi:10.1088/0953-8984/7/35/004

Cited by 24 publications

(20 citation statements)

References 17 publications

(5 reference statements)

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“…The defect structure of Fe-doped LN was also determined to be structure A, consistent with a previous result wherein Fe ions were incorporated into the Li site. 24 However, doping with Fe enhances the photorefractive effect, 1,12 which is inconsistent with the suppression of the photorefractive effect by decreasing C Nb Li site . This is probably because Fe not only decreases C Nb Li site but it also becomes a photorefractive donor.…”

Section: B Analysis Of Impurity Concentration Dependence On Concentrmentioning

confidence: 99%

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Koyama

Nozawa

Maeda

et al. 2015

Journal of Applied Physics

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Resistance degradation due to interstitial hydrogen in photorefractive potassium lithium tantalate niobate single crystals J. Appl. Phys. 96, 6405 (2004); 10.1063/1.1810195 An approach to the defect structure analysis of lithium niobate single crystalsThe defect structures of impurity-doped congruent lithium niobates (c-LN) were determined for impurities with various valences, including divalent, trivalent, and tetravalent impurities, in a concentration range where antisite niobium (Nb Li ) exists. On the basis of the "Li site vacancy model," six kinds of defect structures in impurity-doped c-LN are possible. Using thermodynamic constraints, these can be narrowed down to two kinds. The first structure is that in which impurities, vacancies and Nb exist as defects in the Li site and no defects exist in the Nb site (structure A), described as f½Li Li 1À5xÀjy ½Nb Li x ½M Li y ½V Li 4xþðjÀ1Þy g½Nb Nb ½O O 3 (V: vacancy, M: impurity, j: valence of impurity, x, y: compositional variable (6 ¼0),Li 4xþy g½Nb Â Nb ½O Â O 3 is an example by the Kr€ oger-Vink notation for divalent M. In the second structure, vacancies and Nb exist as defects in the Li site and impurities exist as defects in the Nb site (structure B), described as f½Li Li 1À5xÀðjÀ5Þy ½Nb Li x ½V Li 4xþðjÀ5Þy gf½Nb Nb 1Ày ½M Nb y g½O O 3 . f½Li Â Li 1À5xþy ½Nb •••• Li x ½V 0 Li 4xÀy gf½Nb Â Nb 1Ày ½M 0 Nb y g½O Â O 3 is an example for tetravalent M. Since the relationship between impurity concentration and lattice constants for structures A and B differs, the defect structures can be differentiated by analyzing lattice constant variations as a function of impurity concentration. The results show that the defect structure of divalent and trivalent impurity-doped c-LN is structure A and that of tetravalent impurity-doped c-LN is structure B. The Nb Li concentration increased with increasing tetravalent impurity concentration. In contrast, the Nb Li concentration decreased with increasing divalent and trivalent impurities, leading to suppression of optical damage. The valence of an impurity determines whether the impurity is located in the Li site or Nb site in c-LN, consequently determining whether Nb Li decreases or increases when the population of the impurity changes. V C 2015 AIP Publishing LLC. [http://dx.

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Section: B Analysis Of Impurity Concentration Dependence On Concentrmentioning

confidence: 99%

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Koyama

Nozawa

Maeda

et al. 2015

Journal of Applied Physics

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“…In lithium niobate (LiNbO 3 ) with its favorable nonlinear, and electro-optical properties, Er ions have been utilized in integrated optical lasers and optical amplifiers [1][2][3][4][5][6]. In this material, the trivalent ions occupy dominantly a Li site [7,8], and hence require charge compensation leading to complicated multisite spectra that are quite complicated in particular since the number and relative abundances of sites depend on the stoichiometry of the crystal, the thermal history, and the presence of other co-dopants. Nevertheless, a quite good (although not complete) understanding has been achieved [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Combined excitation emission spectroscopy of defects for site-selective probing of ferroelectric domain inversion in lithium niobate

Dierolf

Sandmann

2007

Journal of Luminescence

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“…[25][26][27][28] Referring to (1 104) and (01 14) planes. This implies that h 1 104 ϭh 01 14 ϳ0 for Mn 2ϩ as well.…”

Section: A Xsw: On-center Substitution Of Mnmentioning

confidence: 99%

Impurity structure in a molecular ionic crystal: Atomic-scale x-ray study ofCaCO3:Mn2+

2001

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The lattice sites and spatial disorder of isolated Mn 2ϩ ions in calcite were examined with x-ray standing waves, and the structure of the surrounding ions was examined with extended x-ray absorption fine-structure spectroscopy. The Mn 2ϩ ion is found to be on-center substitutional at the Ca 2ϩ site, with spatial disorder comparable to that of Ca 2ϩ . The first-neighbor Mn-O distance is found to be the same as that in the isostructural MnCO 3 . The radial distance of the closest Mn-Ca shell is reduced by ϳ2% from the undistorted Ca-Ca distance. Based on these measurements, an atomic-scale structural model of the Mn 2ϩ site suggests that the intramolecular distortion in the first-neighbor CO 3 2Ϫ anions plays a key role in establishing the conserved first-neighbor Mn-O distance while maintaining ordering with respect to the lattice. The CaCO 3 :Mn 2ϩ structure is shown to be characteristically distinct from those of analogous impurities in monatomic ionic crystals.

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The lattice position of Fe in Fe-doped LiNbO₃

Cited by 24 publications

References 17 publications

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Combined excitation emission spectroscopy of defects for site-selective probing of ferroelectric domain inversion in lithium niobate

Impurity structure in a molecular ionic crystal: Atomic-scale x-ray study ofCaCO3:Mn2+

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The lattice position of Fe in Fe-doped LiNbO3

Cited by 24 publications

References 17 publications

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Investigation of defect structure of impurity-doped lithium niobate by combining thermodynamic constraints with lattice constant variations

Combined excitation emission spectroscopy of defects for site-selective probing of ferroelectric domain inversion in lithium niobate

Impurity structure in a molecular ionic crystal: Atomic-scale x-ray study ofCaCO3:Mn2+

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The lattice position of Fe in Fe-doped LiNbO₃