Study of crystal-field excitations and Raman active phonons in o-DyMnO3.
Result description
In DyMnO3 orthorhombic single crystals,the weak Raman active phonon softening below T=100 K is correlated with the study of infrared active Dy3+ CF excitations as a function of temperature and under applied magnetic field.We detect five H13/2 CF transitions that we predict with appropriate CF Hamiltonian and we confirm that the magnetic easy axis lies in the ab plane.While the CF energy level shifts below T=100 K reflect different displacements of the oxygen ions that contribute to the phonon softening,lifting of the ground state Kramers doublet degeneracy(30 cm-1) is observed below TN=39 K due to the anisotropic Mn3+-Dy3+ interaction, which could be responsible for the stability of the bc-cycloid ferroelectric phase.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Study of crystal-field excitations and Raman active phonons in o-DyMnO3.
Original language description
In DyMnO3 orthorhombic single crystals,the weak Raman active phonon softening below T=100 K is correlated with the study of infrared active Dy3+ CF excitations as a function of temperature and under applied magnetic field.We detect five H13/2 CF transitions that we predict with appropriate CF Hamiltonian and we confirm that the magnetic easy axis lies in the ab plane.While the CF energy level shifts below T=100 K reflect different displacements of the oxygen ions that contribute to the phonon softening,lifting of the ground state Kramers doublet degeneracy(30 cm-1) is observed below TN=39 K due to the anisotropic Mn3+-Dy3+ interaction, which could be responsible for the stability of the bc-cycloid ferroelectric phase.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Magnetism and Magnetic Materials
ISSN
0304-8853
e-ISSN
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Volume of the periodical
323
Issue of the periodical within the volume
8
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
5
Pages from-to
1104-1108
UT code for WoS article
000286197000012
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BM - Solid-state physics and magnetism
Year of implementation
2011