Correlation between the thermal diffusivity and the velocity of ultrasound in YVO4 single crystals
Identifieur interne : 001437 ( Main/Exploration ); précédent : 001436; suivant : 001438Correlation between the thermal diffusivity and the velocity of ultrasound in YVO4 single crystals
Auteurs : J. Bodzenta [Pologne] ; A. Kazmierczak-Bałata [Pologne] ; T. Lukasiewicz [Pologne] ; M. Pyka [Pologne]Source :
- The European physical journal. Special topics
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Dopage.
English descriptors
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Abstract
Four single crystals of YVO4 were examined to determine their thermal and elastic properties. The thermal diffusivity was investigated by photothermal method using the mirage effect. The velocity of ultrasound in crystals was measured using the pulse echo method. Two of investigated samples were doped with neodymium (1 at.% and 2 at.% of Nd), one with calcium and thulium (0.4 at.% of Ca and 5 at.% of Tm), and one was pure crystal. Experimental results showed anisotropy of the thermal diffusivity and the velocity of ultrasound. The thermal diffusivity as well as the sound velocity is lower in (001) crystallographic plane than in [001] direction (c-axis). Both quantities decrease with growing concentration of dopants for all crystallographic direction, but the influence of dopants is more distinct in the case of the thermal diffusivity. This fact allows to draw the conclusion that impurity atoms create scattering centres in crystal structure which result in shortening of phonon mean free paths and lowering of the thermal conductivity.
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Kazmierczak-Bałata</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Silesian University of Technology, Institute of Physics, Krzywoustego 2</s1><s2>44-100 Gliwice</s2><s3>POL</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>44-100 Gliwice</wicri:noRegion></affiliation></author><author><name sortKey="Lukasiewicz, T" sort="Lukasiewicz, T" uniqKey="Lukasiewicz T" first="T." last="Lukasiewicz">T. Lukasiewicz</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Electronic Materials Technology, Wólczynska 133</s1><s2>01-919 Warszawa</s2><s3>POL</s3><sZ>3 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>01-919 Warszawa</wicri:noRegion></affiliation></author><author><name sortKey="Pyka, M" sort="Pyka, M" uniqKey="Pyka M" first="M." last="Pyka">M. Pyka</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Silesian University of Technology, Institute of Physics, Krzywoustego 2</s1><s2>44-100 Gliwice</s2><s3>POL</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>44-100 Gliwice</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">08-0407549</idno><date when="2008">2008</date><idno type="stanalyst">PASCAL 08-0407549 INIST</idno><idno type="RBID">Pascal:08-0407549</idno><idno type="wicri:Area/Pascal/Corpus">000615</idno><idno type="wicri:Area/Pascal/Curation">000615</idno><idno type="wicri:Area/Pascal/Checkpoint">000666</idno><idno type="wicri:explorRef" wicri:stream="Pascal" wicri:step="Checkpoint">000666</idno><idno type="wicri:Area/Main/Merge">001477</idno><idno type="wicri:Area/Main/Curation">001437</idno><idno type="wicri:Area/Main/Exploration">001437</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Correlation between the thermal diffusivity and the velocity of ultrasound in YVO<sub>4</sub> single crystals</title><author><name sortKey="Bodzenta, J" sort="Bodzenta, J" uniqKey="Bodzenta J" first="J." last="Bodzenta">J. Bodzenta</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Silesian University of Technology, Institute of Physics, Krzywoustego 2</s1><s2>44-100 Gliwice</s2><s3>POL</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>44-100 Gliwice</wicri:noRegion></affiliation></author><author><name sortKey="Kazmierczak Balata, A" sort="Kazmierczak Balata, A" uniqKey="Kazmierczak Balata A" first="A." last="Kazmierczak-Bałata">A. Kazmierczak-Bałata</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Silesian University of Technology, Institute of Physics, Krzywoustego 2</s1><s2>44-100 Gliwice</s2><s3>POL</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>44-100 Gliwice</wicri:noRegion></affiliation></author><author><name sortKey="Lukasiewicz, T" sort="Lukasiewicz, T" uniqKey="Lukasiewicz T" first="T." last="Lukasiewicz">T. Lukasiewicz</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Electronic Materials Technology, Wólczynska 133</s1><s2>01-919 Warszawa</s2><s3>POL</s3><sZ>3 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>01-919 Warszawa</wicri:noRegion></affiliation></author><author><name sortKey="Pyka, M" sort="Pyka, M" uniqKey="Pyka M" first="M." last="Pyka">M. Pyka</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Silesian University of Technology, Institute of Physics, Krzywoustego 2</s1><s2>44-100 Gliwice</s2><s3>POL</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>44-100 Gliwice</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">The European physical journal. Special topics</title></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The European physical journal. Special topics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anisotropy</term><term>Doping</term><term>Elasticity</term><term>Impurity density</term><term>Monocrystals</term><term>Photothermal effects</term><term>Pulse echo method</term><term>Sound velocity</term><term>Thermal conductivity</term><term>Thermal diffusivity</term><term>Thermal properties</term><term>Ultrasonic waves</term><term>Yttrium Vanadates</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Diffusivité thermique</term><term>Conductivité thermique</term><term>Ultrason</term><term>Propriété thermique</term><term>Elasticité</term><term>Effet photothermique</term><term>Méthode écho impulsion</term><term>Dopage</term><term>Anisotropie</term><term>Célérité son</term><term>Concentration impureté</term><term>Monocristal</term><term>Yttrium Vanadate</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Dopage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Four single crystals of YVO<sub>4</sub> were examined to determine their thermal and elastic properties. The thermal diffusivity was investigated by photothermal method using the mirage effect. The velocity of ultrasound in crystals was measured using the pulse echo method. Two of investigated samples were doped with neodymium (1 at.% and 2 at.% of Nd), one with calcium and thulium (0.4 at.% of Ca and 5 at.% of Tm), and one was pure crystal. Experimental results showed anisotropy of the thermal diffusivity and the velocity of ultrasound. The thermal diffusivity as well as the sound velocity is lower in (001) crystallographic plane than in [001] direction (c-axis). Both quantities decrease with growing concentration of dopants for all crystallographic direction, but the influence of dopants is more distinct in the case of the thermal diffusivity. This fact allows to draw the conclusion that impurity atoms create scattering centres in crystal structure which result in shortening of phonon mean free paths and lowering of the thermal conductivity.</div></front></TEI><affiliations><list><country><li>Pologne</li></country></list><tree><country name="Pologne"><noRegion><name sortKey="Bodzenta, J" sort="Bodzenta, J" uniqKey="Bodzenta J" first="J." last="Bodzenta">J. Bodzenta</name></noRegion><name sortKey="Kazmierczak Balata, A" sort="Kazmierczak Balata, A" uniqKey="Kazmierczak Balata A" first="A." last="Kazmierczak-Bałata">A. Kazmierczak-Bałata</name><name sortKey="Lukasiewicz, T" sort="Lukasiewicz, T" uniqKey="Lukasiewicz T" first="T." last="Lukasiewicz">T. Lukasiewicz</name><name sortKey="Pyka, M" sort="Pyka, M" uniqKey="Pyka M" first="M." last="Pyka">M. Pyka</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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