Field-induced magnetic transitions in the quasi-two-dimensional heavy-fermion antiferromagnets CenRhIn3n+2 (n=1 or 2)
Identifieur interne : 00FD38 ( Main/Repository ); précédent : 00FD37; suivant : 00FD39Field-induced magnetic transitions in the quasi-two-dimensional heavy-fermion antiferromagnets CenRhIn3n+2 (n=1 or 2)
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Abstract
We have measured the field-dependent heat capacity in the tetragonal antiferromagnets CeRhIn5 and Ce2RhIn8, both of which have an enhanced value of the electronic specific heat coefficient γ∼400 mJ/molCeK2 above TN. For TN, the specific heat data at zero applied magnetic field are consistent with the existence of an anisotropic spin-density wave opening a gap in the Fermi surface for CeRhIn5, while Ce2RhIn8 shows behavior consistent with a simple antiferromagnetic magnon. From these results, the magnetic structure, in a manner similar to the crystal structure, appears more two dimensional in CeRhIn5 than in Ce2RhIn8 where only about 12% of the Fermi surface remains ungapped relative to 92% for Ce2RhIn8. When B||c, both compounds behave in a manner expected for heavy-fermion systems as both TN and the electronic heat capacity decrease as field is applied. When the field is applied in the tetragonal basal plane (B||a), CeRhIn5 and Ce2RhIn8 have very similar phase diagrams which contain both first- and second-order field-induced magnetic transitions.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Field-induced magnetic transitions in the quasi-two-dimensional heavy-fermion antiferromagnets Ce<sub>n</sub>RhIn<sub>3n+2</sub> (n=1 or 2)</title><author><name sortKey="Cornelius, A L" uniqKey="Cornelius A">A. L. Cornelius</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Physics, University of Nevada, Las Vegas, Nevada 89154-4002</s1><sZ>1 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Nevada</region></placeName><wicri:cityArea>Department of Physics, University of Nevada, Las Vegas</wicri:cityArea></affiliation></author><author><name sortKey="Pagliuso, P G" uniqKey="Pagliuso P">P. G. Pagliuso</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545</s1><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Nouveau-Mexique</region></placeName><wicri:cityArea>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos</wicri:cityArea></affiliation></author><author><name sortKey="Hundley, M F" uniqKey="Hundley M">M. F. Hundley</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545</s1><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Nouveau-Mexique</region></placeName><wicri:cityArea>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos</wicri:cityArea></affiliation></author><author><name sortKey="Sarrao, J L" uniqKey="Sarrao J">J. L. Sarrao</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545</s1><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Nouveau-Mexique</region></placeName><wicri:cityArea>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos</wicri:cityArea></affiliation></author></titleStmt><publicationStmt><idno type="inist">01-0406982</idno><date when="2001-10-01">2001-10-01</date><idno type="stanalyst">PASCAL 01-0406982 AIP</idno><idno type="RBID">Pascal:01-0406982</idno><idno type="wicri:Area/Main/Corpus">010795</idno><idno type="wicri:Area/Main/Repository">00FD38</idno></publicationStmt><seriesStmt><idno type="ISSN">1098-0121</idno><title level="j" type="abbreviated">Phys. rev., B, Condens. matter mater. phys.</title><title level="j" type="main">Physical review. B, Condensed matter and materials physics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Antiferromagnetic materials</term><term>Cerium alloys</term><term>Experimental study</term><term>Fermi surface</term><term>Heavy fermion systems</term><term>Indium alloys</term><term>Magnetic structure</term><term>Magnetic transitions</term><term>Rhodium alloys</term><term>Specific heat</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>7118</term><term>7127</term><term>7530K</term><term>6540</term><term>Etude expérimentale</term><term>Cérium alliage</term><term>Rhodium alliage</term><term>Indium alliage</term><term>Transition magnétique</term><term>Chaleur massique</term><term>Surface Fermi</term><term>Structure magnétique</term><term>Système fermions lourds</term><term>Matériau antiferromagnétique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We have measured the field-dependent heat capacity in the tetragonal antiferromagnets CeRhIn<sub>5</sub> and Ce<sub>2</sub>RhIn<sub>8</sub>, both of which have an enhanced value of the electronic specific heat coefficient γ∼400 mJ/molCeK<sup>2</sup> above T<sub>N</sub>. For T<sub>N</sub> , the specific heat data at zero applied magnetic field are consistent with the existence of an anisotropic spin-density wave opening a gap in the Fermi surface for CeRhIn<sub>5</sub>, while Ce<sub>2</sub>RhIn<sub>8</sub> shows behavior consistent with a simple antiferromagnetic magnon. From these results, the magnetic structure, in a manner similar to the crystal structure, appears more two dimensional in CeRhIn<sub>5</sub> than in Ce<sub>2</sub>RhIn<sub>8</sub> where only about 12% of the Fermi surface remains ungapped relative to 92% for Ce<sub>2</sub>RhIn<sub>8</sub>. When B||c, both compounds behave in a manner expected for heavy-fermion systems as both T<sub>N</sub> and the electronic heat capacity decrease as field is applied. When the field is applied in the tetragonal basal plane (B||a), CeRhIn<sub>5</sub> and Ce<sub>2</sub>RhIn<sub>8</sub> have very similar phase diagrams which contain both first- and second-order field-induced magnetic transitions.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1098-0121</s0></fA01><fA02 i1="01"><s0>PRBMDO</s0></fA02><fA03 i2="1"><s0>Phys. rev., B, Condens. matter mater. phys.</s0></fA03><fA05><s2>64</s2></fA05><fA06><s2>14</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Field-induced magnetic transitions in the quasi-two-dimensional heavy-fermion antiferromagnets Ce<sub>n</sub>RhIn<sub>3n+2</sub> (n=1 or 2)</s1></fA08><fA11 i1="01" i2="1"><s1>CORNELIUS (A. L.)</s1></fA11><fA11 i1="02" i2="1"><s1>PAGLIUSO (P. G.)</s1></fA11><fA11 i1="03" i2="1"><s1>HUNDLEY (M. F.)</s1></fA11><fA11 i1="04" i2="1"><s1>SARRAO (J. L.)</s1></fA11><fA14 i1="01"><s1>Department of Physics, University of Nevada, Las Vegas, Nevada 89154-4002</s1><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545</s1><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s2>144411-144411-4</s2></fA20><fA21><s1>2001-10-01</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>144 B</s2></fA43><fA44><s0>8100</s0><s1>© 2001 American Institute of Physics. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>01-0406982</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Physical review. B, Condensed matter and materials physics</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>We have measured the field-dependent heat capacity in the tetragonal antiferromagnets CeRhIn<sub>5</sub> and Ce<sub>2</sub>RhIn<sub>8</sub>, both of which have an enhanced value of the electronic specific heat coefficient γ∼400 mJ/molCeK<sup>2</sup> above T<sub>N</sub>. For T<sub>N</sub> , the specific heat data at zero applied magnetic field are consistent with the existence of an anisotropic spin-density wave opening a gap in the Fermi surface for CeRhIn<sub>5</sub>, while Ce<sub>2</sub>RhIn<sub>8</sub> shows behavior consistent with a simple antiferromagnetic magnon. From these results, the magnetic structure, in a manner similar to the crystal structure, appears more two dimensional in CeRhIn<sub>5</sub> than in Ce<sub>2</sub>RhIn<sub>8</sub> where only about 12% of the Fermi surface remains ungapped relative to 92% for Ce<sub>2</sub>RhIn<sub>8</sub>. When B||c, both compounds behave in a manner expected for heavy-fermion systems as both T<sub>N</sub> and the electronic heat capacity decrease as field is applied. When the field is applied in the tetragonal basal plane (B||a), CeRhIn<sub>5</sub> and Ce<sub>2</sub>RhIn<sub>8</sub> have very similar phase diagrams which contain both first- and second-order field-induced magnetic transitions.</s0></fC01><fC02 i1="01" i2="3"><s0>001B70A18</s0></fC02><fC02 i1="02" i2="3"><s0>001B70A27</s0></fC02><fC02 i1="03" i2="3"><s0>001B70E30K</s0></fC02><fC02 i1="04" i2="3"><s0>001B60E</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>7118</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="02" i2="3" l="FRE"><s0>7127</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="03" i2="3" l="FRE"><s0>7530K</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="04" i2="3" l="FRE"><s0>6540</s0><s2>PAC</s2><s4>INC</s4></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Etude expérimentale</s0></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Experimental study</s0></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Cérium alliage</s0></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Cerium alloys</s0></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Rhodium alliage</s0></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Rhodium alloys</s0></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Indium alliage</s0></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Indium alloys</s0></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Transition magnétique</s0></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Magnetic transitions</s0></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Chaleur massique</s0></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Specific heat</s0></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Surface Fermi</s0></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Fermi surface</s0></fC03><fC03 i1="12" i2="3" l="FRE"><s0>Structure magnétique</s0></fC03><fC03 i1="12" i2="3" l="ENG"><s0>Magnetic structure</s0></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Système fermions lourds</s0></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Heavy fermion systems</s0></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Matériau antiferromagnétique</s0></fC03><fC03 i1="14" i2="3" l="ENG"><s0>Antiferromagnetic materials</s0></fC03><fN21><s1>281</s1></fN21><fN47 i1="01" i2="1"><s0>0140M001101</s0></fN47></pA></standard>
