Extraction of the Spin Glass Correlation Length
Identifieur interne : 001604 ( France/Analysis ); précédent : 001603; suivant : 001605Extraction of the Spin Glass Correlation Length
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Abstract
The peak of the spin glass relaxation rate, S(t)=d[-MTRM(t, t w)/H]/d ln t , is directly related to the typical value of the free energy barrier which can be explored over experimental time scales. A change in magnetic field H generates an energy Ez=NsχfcH 2 by which the barrier heights are reduced, where χfc is the field cooled susceptibility per spin, and Ns is the number of correlated spins. The shift of the peak of S(t) gives Ez , generating the correlation length, ξ(t, T) for Cu:Mn 6 at. % and CdCr1.7 In0.3S 4 . Fits to power law dynamics, ξ(t, T)tα(T) and activated dynamics ξ(t, T)(lnt) 1/ψ compare well with simulation fits but possess too small a prefactor for activated dynamics.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Extraction of the Spin Glass Correlation Length</title><author><name sortKey="Joh, Y G" uniqKey="Joh Y">Y. G. Joh</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Physics, University of California, Riverside, California 92521-0101</s1></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>Department of Physics, University of California, Riverside</wicri:cityArea></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Service de Physique de l'Etat Condense, CEA Saclay, 91191 Gif sur Yvette, Cedex, France</s1></inist:fA14><country xml:lang="fr">France</country><wicri:regionArea>Service de Physique de l'Etat Condense, CEA Saclay, 91191 Gif sur Yvette, Cedex</wicri:regionArea><wicri:noRegion>Cedex</wicri:noRegion><wicri:noRegion>Cedex</wicri:noRegion></affiliation></author><author><name sortKey="Orbach, R" uniqKey="Orbach R">R. Orbach</name></author><author><name sortKey="Wood, G G" uniqKey="Wood G">G. G. Wood</name></author><author><name sortKey="Hammann, J" uniqKey="Hammann J">J. Hammann</name></author><author><name sortKey="Vincent, E" uniqKey="Vincent E">E. Vincent</name></author></titleStmt><publicationStmt><idno type="inist">99-0031039</idno><date when="1999-01-11">1999-01-11</date><idno type="stanalyst">PASCAL 99-0031039 AIP</idno><idno type="RBID">Pascal:99-0031039</idno><idno type="wicri:Area/Main/Corpus">015C54</idno><idno type="wicri:Area/Main/Repository">014534</idno><idno type="wicri:Area/France/Extraction">001604</idno></publicationStmt><seriesStmt><idno type="ISSN">0031-9007</idno><title level="j" type="abbreviated">Phys. rev. lett.</title><title level="j" type="main">Physical review letters</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cadmium alloys</term><term>Chromium alloys</term><term>Copper alloys</term><term>Correlation theory</term><term>Experimental study</term><term>Indium alloys</term><term>Magnetic field effects</term><term>Magnetic susceptibility</term><term>Magnetization</term><term>Manganese alloys</term><term>Relaxation</term><term>Spin glasses</term><term>Sulfur</term><term>Theoretical study</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>7550L</term><term>7510N</term><term>7540G</term><term>Etude expérimentale</term><term>Etude théorique</term><term>Verre spin</term><term>Relaxation</term><term>Effet champ magnétique</term><term>Susceptibilité magnétique</term><term>Cuivre alliage</term><term>Cadmium alliage</term><term>Indium alliage</term><term>Chrome alliage</term><term>Soufre</term><term>Manganèse alliage</term><term>Aimantation</term><term>Théorie corrélation</term></keywords><keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Soufre</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The peak of the spin glass relaxation rate, S(t)=d[-M<sub>TRM</sub>(t, t<sub> w</sub>)/H]/d ln t , is directly related to the typical value of the free energy barrier which can be explored over experimental time scales. A change in magnetic field H generates an energy E<sub>z</sub>=N<sub>s</sub>χ<sub>fc</sub>H<sup> 2</sup> by which the barrier heights are reduced, where χ<sub>fc</sub> is the field cooled susceptibility per spin, and N<sub>s</sub> is the number of correlated spins. The shift of the peak of S(t) gives E<sub>z</sub> , generating the correlation length, ξ(t, T) for Cu:Mn 6 at. % and CdCr<sub>1.7</sub> In<sub>0.3</sub>S <sub>4</sub> . Fits to power law dynamics, ξ(t, T)t<sup>α(T)</sup> and activated dynamics ξ(t, T)(lnt)<sup> 1/ψ</sup> compare well with simulation fits but possess too small a prefactor for activated dynamics.</div> </front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0031-9007</s0></fA01><fA02 i1="01"><s0>PRLTAO</s0></fA02><fA03 i2="1"><s0>Phys. rev. lett.</s0></fA03><fA05><s2>82</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Extraction of the Spin Glass Correlation Length</s1></fA08><fA11 i1="01" i2="1"><s1>JOH (Y. G.)</s1></fA11><fA11 i1="02" i2="1"><s1>ORBACH (R.)</s1></fA11><fA11 i1="03" i2="1"><s1>WOOD (G. G.)</s1></fA11><fA11 i1="04" i2="1"><s1>HAMMANN (J.)</s1></fA11><fA11 i1="05" i2="1"><s1>VINCENT (E.)</s1></fA11><fA14 i1="01"><s1>Department of Physics, University of California, Riverside, California 92521-0101</s1></fA14><fA14 i1="02"><s1>Service de Physique de l'Etat Condense, CEA Saclay, 91191 Gif sur Yvette, Cedex, France</s1></fA14><fA20><s1>438-441</s1></fA20><fA21><s1>1999-01-11</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>8895</s2></fA43><fA44><s0>8100</s0><s1>© 1999 American Institute of Physics. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>99-0031039</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i2="1"><s0>Physical review letters</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>The peak of the spin glass relaxation rate, S(t)=d[-M<sub>TRM</sub>(t, t<sub> w</sub>)/H]/d ln t , is directly related to the typical value of the free energy barrier which can be explored over experimental time scales. A change in magnetic field H generates an energy E<sub>z</sub>=N<sub>s</sub>χ<sub>fc</sub>H<sup> 2</sup> by which the barrier heights are reduced, where χ<sub>fc</sub> is the field cooled susceptibility per spin, and N<sub>s</sub> is the number of correlated spins. The shift of the peak of S(t) gives E<sub>z</sub> , generating the correlation length, ξ(t, T) for Cu:Mn 6 at. % and CdCr<sub>1.7</sub> In<sub>0.3</sub>S <sub>4</sub> . Fits to power law dynamics, ξ(t, T)t<sup>α(T)</sup> and activated dynamics ξ(t, T)(lnt)<sup> 1/ψ</sup> compare well with simulation fits but possess too small a prefactor for activated dynamics.</s0> </fC01><fC02 i1="01" i2="3"><s0>001B70E50L</s0></fC02><fC02 i1="02" i2="3"><s0>001B70E10N</s0></fC02><fC02 i1="03" i2="3"><s0>001B70E40G</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>7550L</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="02" i2="3" l="FRE"><s0>7510N</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="03" i2="3" l="FRE"><s0>7540G</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Etude expérimentale</s0></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Experimental study</s0></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Etude théorique</s0></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Theoretical study</s0></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Verre spin</s0></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Spin glasses</s0></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Relaxation</s0></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Relaxation</s0></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Effet champ magnétique</s0></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Magnetic field effects</s0></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Susceptibilité magnétique</s0></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Magnetic susceptibility</s0></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Cuivre alliage</s0></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Copper alloys</s0></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Cadmium alliage</s0></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Cadmium alloys</s0></fC03><fC03 i1="12" i2="3" l="FRE"><s0>Indium alliage</s0></fC03><fC03 i1="12" i2="3" l="ENG"><s0>Indium alloys</s0></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Chrome alliage</s0></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Chromium alloys</s0></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Soufre</s0><s2>NC</s2></fC03><fC03 i1="14" i2="3" l="ENG"><s0>Sulfur</s0><s2>NC</s2></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Manganèse alliage</s0></fC03><fC03 i1="15" i2="3" l="ENG"><s0>Manganese alloys</s0></fC03><fC03 i1="16" i2="3" l="FRE"><s0>Aimantation</s0></fC03><fC03 i1="16" i2="3" l="ENG"><s0>Magnetization</s0></fC03><fC03 i1="17" i2="3" l="FRE"><s0>Théorie corrélation</s0></fC03><fC03 i1="17" i2="3" l="ENG"><s0>Correlation theory</s0></fC03><fN21><s1>011</s1></fN21><fN47 i1="01" i2="1"><s0>9901M001859</s0></fN47></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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