Anisotropic Phase Diagram for Quadrupole Ordering and Possible Crystal Field Level Structure in TmTe
Identifieur interne : 000686 ( Pascal/Checkpoint ); précédent : 000685; suivant : 000687Anisotropic Phase Diagram for Quadrupole Ordering and Possible Crystal Field Level Structure in TmTe
Auteurs : Ryousuke Shiina [Japon] ; Tatsuya Nagao [Japon]Source :
- Journal of the Physical Society of Japan [ 0031-9015 ] ; 2008.
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- Pascal (Inist)
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- KwdEn :
Abstract
The origin of an anisotropic phase diagram for the antiferro-quadrupolar (AFQ) order in TmTe is studied using a realistic J = 7/2 multiplet model, based on a previous analysis for the classical limit J → oo. Assuming the Γ3-type AFQ order parameters, a quantitative comparison of the phase diagram with the experiments is presented for a few candidates of the crystal field (CF) level schemes. It is shown that a scheme with a sequence from low- to high-energy levels, Γ8-Γ6-Γ7, naturally explains the observed field dependence and anisotropy of the phase diagram. The resonant x-ray scattering signals in the AFQ phase are studied to explore a possibility of identifying the order parameter and the CF scheme experimentally.
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<author><name sortKey="Shiina, Ryousuke" sort="Shiina, Ryousuke" uniqKey="Shiina R" first="Ryousuke" last="Shiina">Ryousuke Shiina</name>
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<author><name sortKey="Shiina, Ryousuke" sort="Shiina, Ryousuke" uniqKey="Shiina R" first="Ryousuke" last="Shiina">Ryousuke Shiina</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anisotropy</term>
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<term>Crystal field</term>
<term>Magnetic field effects</term>
<term>Order parameters</term>
<term>Ordering</term>
<term>Phase transformations</term>
<term>Quadrupole interactions</term>
<term>Resonance scattering</term>
<term>Thulium tellurides</term>
<term>X-ray scattering</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Anisotropie</term>
<term>Antiferromagnétisme</term>
<term>Relation ordre</term>
<term>Champ cristallin</term>
<term>Interaction quadripolaire</term>
<term>Paramètre ordre</term>
<term>Diffusion résonnante</term>
<term>Diffusion RX</term>
<term>Transformation phase</term>
<term>Effet champ magnétique</term>
<term>Tellurure de thulium</term>
<term>TmTe</term>
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<front><div type="abstract" xml:lang="en">The origin of an anisotropic phase diagram for the antiferro-quadrupolar (AFQ) order in TmTe is studied using a realistic J = 7/2 multiplet model, based on a previous analysis for the classical limit J → oo. Assuming the Γ<sub>3</sub>
-type AFQ order parameters, a quantitative comparison of the phase diagram with the experiments is presented for a few candidates of the crystal field (CF) level schemes. It is shown that a scheme with a sequence from low- to high-energy levels, Γ<sub>8</sub>
-Γ<sub>6</sub>
-Γ<sub>7</sub>
, naturally explains the observed field dependence and anisotropy of the phase diagram. The resonant x-ray scattering signals in the AFQ phase are studied to explore a possibility of identifying the order parameter and the CF scheme experimentally.</div>
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<fC01 i1="01" l="ENG"><s0>The origin of an anisotropic phase diagram for the antiferro-quadrupolar (AFQ) order in TmTe is studied using a realistic J = 7/2 multiplet model, based on a previous analysis for the classical limit J → oo. Assuming the Γ<sub>3</sub>
-type AFQ order parameters, a quantitative comparison of the phase diagram with the experiments is presented for a few candidates of the crystal field (CF) level schemes. It is shown that a scheme with a sequence from low- to high-energy levels, Γ<sub>8</sub>
-Γ<sub>6</sub>
-Γ<sub>7</sub>
, naturally explains the observed field dependence and anisotropy of the phase diagram. The resonant x-ray scattering signals in the AFQ phase are studied to explore a possibility of identifying the order parameter and the CF scheme experimentally.</s0>
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<s5>04</s5>
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