Alternative crystal field parameters for rare-earth ions obtained from various techniques: IV. Comparative analysis of crystal field parameters obtained from inelastic neutron scattering and related studies of RE ions (RE=Er3+, Ho3+, Nd3+, Pr3+) in REBa2Cu3O7−δ high-Tc superconductors

Rudowicz, Czesław; Lewandowska, Monika

doi:10.1016/j.jallcom.2012.06.012

Cited by 9 publications

(3 citation statements)

References 66 publications

(270 reference statements)

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“…Our recent study indicates that the orthorhombic standardization idea, based on the simplest value of the rhombicity ratio, needs to be complemented by consideration of nonuniqueness of the signs of CFPs, i.e., that several physically identical sets may be obtained by changing the signs of some CFPs. Note that this problem is more acute for monoclinic CFP sets as revealed by the algebraic symmetry considerations .…”

Section: Energy Level Calculationsmentioning

confidence: 99%

Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇

2012

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Absorption emission and excitation spectra are measured and analyzed to achieve assignments of energy levels for 4f(N) ions in Ba(2)YCl(7):RE(3+) (RE = Pr, Nd, Tb, Dy, Ho, Er, and Tm) crystals. The experimental energy levels were analyzed in terms of the usual free-ion parameters and the crystal field (CF) ones, B(kq), in the Wybourne notation. The orthorhombic C(2v) symmetry is shown to be a good approximation of the actual triclinic C(1) site symmetry at the metal center. The starting values of the CF parameters B(kq) used for fittings for the studied crystals were obtained from superposition model analysis. A good agreement between the calculated and experimental energy levels was obtained with rms deviations in the range from 6.8 cm(-1) (for Ho(3+)) to 14.1 cm(-1) (for Pr(3+)). The fitted sets of B(kq) parameters are, in general, consistent across the 4f(N) series. This study has enabled determination and discussion of the trends in variation of the free-ion parameters and CF ones across the 4f(N) series. The CF parameter set and energy level structure obtained for Nd(3+) ion in Ba(2)YCl(7) crystal are consistent with those for Nd(3+) in structurally related RbY(2)Cl(7) crystal. This systematic analysis of CF parameters is one of only few such studies encompassing nearly whole series of RE(3+) ions.

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Section: Energy Level Calculationsmentioning

confidence: 99%

Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇

2012

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“…The second important point, systematic behavior of fitted CFPs for Yb 3+ ion in different garnets, is closely related to their reliability and can be conveniently performed by the standardization procedures that were developed and utilized by Rudowicz and coworkers (see more details in the literature [53][54][55][56][57]). According to this idea, we find that all the obtained CFPs in Eqs.…”

Section: Discussionmentioning

confidence: 99%

Crystal-field study for the orthorhombic Yb3+ centers in Ca3Sc2Ge3O12 and Lu3Ga5O12 garnets

Liu¹,

Zheng²

2015

Journal of Alloys and Compounds

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“…Moreover, there are phenomena that can only be probed by TAS due to the unique characteristics of neutron during interaction especially with magnetic materials. Recent research on phenomena such as quantum magnetism [2,3], high-T c superconductor materials [4,5], frustrated magnets [6], energy/hydrogen storage [7][8][9][10], multiferroics [11], and protein dynamics [12,13] are some examples among other topics that apply inelastic neutron scattering to investigate many novel and interesting properties. As a national research institution, BATAN should also be involved in research activities on advanced materials that apply nuclearbased technique for their characterizations.…”

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confidence: 99%

First Magnon of BATAN’s Neutron Triple-Axis Spectrometer

Sumirat

2016

Atom Indo.

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The National Nuclear Energy Agency of Indonesia (BATAN) has one dedicated spectrometer for inelastic neutron scattering experiments. The instrument is a thermal neutron triple-axis spectrometer known as SN1. SN1 was installed in 1992 in the experimental hall of G. A. Siwabessy Research Reactor, Serpong, Banten. Malfunctions of the hardware and software have prevented the instrument from performing inelastic scattering measurements since 1996. The 2011-2015 five years project has been initiated to revitalize and optimize the SN1. The project serves as a preparation for the utilization of SN1 for the investigation of lattice dynamics, spin wave and magnetic excitations in condensed matters that will be started in 2016. In 2013, SN1 has successfully been repaired and was able to measure phonon dispersion relation of available single crystals, i.e., Cu, pyrolytic graphite (PG), Ge, and Al. In 2015, the first experiment on magnetic excitation to investigate magnon dispersion relation of a known Fe single crystal has been carried out. Standard methods of inelastic scattering measurements, i.e., a constant-energy transfer ħ with either fixed final neutron energy E f = 14.7 meV or fixed incoming neutron energy E i = 30.59 meV, and a constant momentum transfer Q with fixed incoming neutron energy E i = 30.59 meV, were applied to measure the low-energy magnetic excitations. For fixed E f measurement, a 5-cm thick PG filter was set between the sample and the analyzer to eliminate /n harmonics. To limit the energy and momentum spreads of the beam, collimations of 40 minutes were applied before and after the sample. The spin waves were measured along the three principal symmetry directions of [00], [0], and []. The measured magnons were compared to values in reference and were found to be in a good agreement with them. With such accomplishments, we are convinced that SN1 is now ready for its inelastic scattering application and will become one of BATAN's neutron instrument which is routinely utilized for materials characterization on lattice dynamics and magnetic excitations by local and foreign scientists. Besides reporting the SN1 first measured magnon, the current status of SN1 instrument development will also be presented briefly.

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Alternative crystal field parameters for rare-earth ions obtained from various techniques: IV. Comparative analysis of crystal field parameters obtained from inelastic neutron scattering and related studies of RE ions (RE=Er3+, Ho3+, Nd3+, Pr3+) in REBa2Cu3O7−δ high-Tc superconductors

Cited by 9 publications

References 66 publications

Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇

Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇

Crystal-field study for the orthorhombic Yb3+ centers in Ca3Sc2Ge3O12 and Lu3Ga5O12 garnets

First Magnon of BATAN’s Neutron Triple-Axis Spectrometer

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Alternative crystal field parameters for rare-earth ions obtained from various techniques: IV. Comparative analysis of crystal field parameters obtained from inelastic neutron scattering and related studies of RE ions (RE=Er3+, Ho3+, Nd3+, Pr3+) in REBa2Cu3O7−δ high-Tc superconductors

Cited by 9 publications

References 66 publications

Optical Spectra and Energy Levels Analysis of the 4fNIons Doped into Ba2YCl7

Optical Spectra and Energy Levels Analysis of the 4fNIons Doped into Ba2YCl7

Crystal-field study for the orthorhombic Yb3+ centers in Ca3Sc2Ge3O12 and Lu3Ga5O12 garnets

First Magnon of BATAN’s Neutron Triple-Axis Spectrometer

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Product

Resources

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Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇

Optical Spectra and Energy Levels Analysis of the 4f^NIons Doped into Ba₂YCl₇