27Al and 89Y nuclear magnetic resonance in yttrium-aluminum garnet

Brog, K. C.; Jones, William H.; Verber, C. M.

doi:10.1016/0031-9163(66)90353-2

Cited by 46 publications

(14 citation statements)

References 5 publications

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“…1). The nuclear quadrupole coupling constants, e 2 qQ/h [4] (e is the electron charge, eq is the zz component of the electric field gradient tensor, Q is the nuclear quadrupole moment, and h is the Planck constant), were the same within the experimental accuracy as in [8][9][10][11][12][13] for both tetrahedral and octahedral sites. The nuclear quadrupole coupling constants, e 2 qQ/h [4] (e is the electron charge, eq is the zz component of the electric field gradient tensor, Q is the nuclear quadrupole moment, and h is the Planck constant), were the same within the experimental accuracy as in [8][9][10][11][12][13] for both tetrahedral and octahedral sites.…”

Section: Resultsmentioning

confidence: 87%

27Al and45Sc NMR Studies of the Y3ScxAl5?xO12 Mixed Garnets

Tien¹,

Charnaya²,

Sun³

et al. 2002

phys. stat. sol. (b)

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The substitution of aluminum with scandium in the mixed yttrium aluminum scandium garnets, Y 3 Sc x Al 5--x O 12 (x ¼ 0, 0.05, 0.5, 1.5), was studied for the first time using 27 Al magic angle spinning (MAS), multiple quantum (MQ) MAS NMR, and 45 Sc MAS NMR. The aluminum and scandium quadrupole coupling constants and isotropic chemical shifts were evaluated for all garnets under study. 27 Al 2D spectra evidenced variation of the isotropic shifts over the aluminum sites in the mixed garnets.

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Section: Resultsmentioning

confidence: 87%

27Al and45Sc NMR Studies of the Y3ScxAl5?xO12 Mixed Garnets

Tien¹,

Charnaya²,

Sun³

et al. 2002

phys. stat. sol. (b)

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“…6(a) results from the coherent precession of the coupled electron-nuclear spins, which evidences the interaction between the unpaired electron of Ce 3+ and the surrounding 27 Al nuclei. The aluminum nuclei which possess a nonzero electric quadrupole moment were extensively used to probe the local charge distribution in YAG crystals [7,[25][26][27]. The effective Hamiltonian for analyzing the interaction with the 27 Al nuclei (I = 5/2) can be written in the form:…”

Section: Magnetic Resonance Of Yag:ce 3+mentioning

confidence: 99%

Electron spin dynamics of Ce3+ ions in YAG crystals studied by pulse-EPR and pump-probe Faraday rotation

et al. 2017

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The spin relaxation dynamics of Ce 3+ ions in heavily cerium-doped YAG crystals is studied using pulse-electron paramagnetic resonance and time-resolved pump-probe Faraday rotation. Both techniques address the 4f ground state, while pump-probe Faraday rotation provides also access to the excited 5d state. We measure a millisecond spin-lattice relaxation time T1, a microsecond spin coherence time T2 and a ∼ 10 ns inhomogeneous spin dephasing time T * 2 for the Ce 3+ ground state at low temperatures. The spin-lattice relaxation of Ce 3+ ions is due to modified Raman processes involving the optical phonon mode at ∼ 125 cm −1 . The relaxation at higher temperature goes through a first excited level of the 2 F 5/2 term at about ω ≈ 228 cm −1 . Effects provided by the hyperfine interaction of the Ce 3+ with the 27 Al nuclei are observed.

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“…YAG is notable as all three elemental components have NMR active nuclides, and pure YAG has been investigated extensively as both a powder and single crystal [23][24][25]. An especially useful paper characterized the magic angle spinning NMR spectra of phases encountered across the Y 2 O 3 -Al 2 O 3 pseudo-binary phase diagram [25].…”

Section: Nmr Spectra Of Yagmentioning

confidence: 99%

Investigating lanthanide dopant distributions in Yttrium Aluminum Garnet (YAG) using solid state paramagnetic NMR

McCarty

Stebbins

2016

Solid State Nuclear Magnetic Resonance

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This paper demonstrates the approach of using paramagnetic effects observed in NMR spectra to investigate the distribution of lanthanide dopant cations in YAG (yttrium aluminum garnet, YAlO) optical materials, as a complimentary technique to optical spectroscopy and other standard methods of characterization. We investigate the effects of Ce, Nd, Yb, Tm, and Tm-Cr on Al andY NMR spectra. We note shifted resonances for both AlO and AlO sites. In some cases, multiple shifted peaks are observable, and some of these can be empirically assigned to dopant cations in known configurations to the observed nuclides. In many cases, AlO peaks shifted by more than one magnetic neighbor can be detected. In general, we observe that the measured intensities of shifted resonances, when spinning sidebands are included, are consistent with predictions from models with dopant cations that are randomly distributed throughout the lattice. In at least one set of Al spectra, we identify two sub-peaks possibly resulting from two paramagnetic cations with magnetically coupled spin states neighboring the observed nucleus. We identify systematic changes in the spectra related to known parameters describing the magnetic effects of lanthanide cations, such as larger shift distances when the expectation value of electron spins is greater. We lastly comment on the promise of this technique in future analyses of laser and other crystalline oxide materials.

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27Al and 89Y nuclear magnetic resonance in yttrium-aluminum garnet

Cited by 46 publications

References 5 publications

27Al and45Sc NMR Studies of the Y3ScxAl5?xO12 Mixed Garnets

27Al and45Sc NMR Studies of the Y3ScxAl5?xO12 Mixed Garnets

Electron spin dynamics of Ce3+ ions in YAG crystals studied by pulse-EPR and pump-probe Faraday rotation

Investigating lanthanide dopant distributions in Yttrium Aluminum Garnet (YAG) using solid state paramagnetic NMR

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