Pressure induced magnetic phase separation in La\(_{0.75}\)Ca\(_{0.25}\)MnO\(_{3}\) manganite
The pressure dependence of the Curie temperature T\(_{C}(P)\) in La\(_{0.75}\)Ca\(_{0.25}\)MnO\(_{3}\) was determined by neutron diffraction up to 8 GPa, and compared with the metallization temperature T\(_{IM}(P)\) \cite{irprl}. The behavior of the two temperatures appears similar over the whole pr...
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| creator | Baldini, M Capogna, L Capone, M Arcangeletti, E Petrillo, C Goncharenko, I Postorino, P |
| description | The pressure dependence of the Curie temperature T\(_{C}(P)\) in La\(_{0.75}\)Ca\(_{0.25}\)MnO\(_{3}\) was determined by neutron diffraction up to 8 GPa, and compared with the metallization temperature T\(_{IM}(P)\) \cite{irprl}. The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. A new P-T phase diagram has been proposed on the basis of the whole set of experimental data. |
| doi_str_mv | 10.48550/arxiv.1112.1927 |
| format | Article |
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The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. 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The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. A new P-T phase diagram has been proposed on the basis of the whole set of experimental data.</description><subject>Antiferromagnetism</subject><subject>Curie temperature</subject><subject>Diffraction</subject><subject>Ferromagnetism</subject><subject>Manganese oxides</subject><subject>Metallizing</subject><subject>Neutron diffraction</subject><subject>Phase diagrams</subject><subject>Phase separation</subject><subject>Physics - Strongly Correlated Electrons</subject><subject>Pressure dependence</subject><subject>Temperature</subject><subject>Temperature dependence</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotkM1LxDAQxYMguKx79yQFL3poTSZJkx5l8QtWVsTjSkmb6drFzdakFUX8301dTzMPfvOY9wg5YTQTWkp6afxn-5ExxiBjBagDMgHOWaoFwBGZhbChlEKuQEo-IS-PHkMYPCats0ONNtmatcO-rZPu1QRMAnbGm77duUgkC7M6L79ppuTP6mL-L2AUD245Kh7XaOHWxrU9HpPDxrwFnP3PKXm6uX6e36WL5e39_GqRGskgxTrXFWu4YIo1ppBCVQUKZaxqGl6hgAqo1nkuaiyEjRdaW1FYBqIAa_mUnO5N_4KXnW-3xn-VYwHlWEAEzvZA53fvA4a-3OwG7-JDZTTOGReQA_8F2gxcBA</recordid><startdate>20111208</startdate><enddate>20111208</enddate><creator>Baldini, M</creator><creator>Capogna, L</creator><creator>Capone, M</creator><creator>Arcangeletti, E</creator><creator>Petrillo, C</creator><creator>Goncharenko, I</creator><creator>Postorino, P</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20111208</creationdate><title>Pressure induced magnetic phase separation in La\(_{0.75}\)Ca\(_{0.25}\)MnO\(_{3}\) manganite</title><author>Baldini, M ; 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The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. A new P-T phase diagram has been proposed on the basis of the whole set of experimental data.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1112.1927</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Antiferromagnetism Curie temperature Diffraction Ferromagnetism Manganese oxides Metallizing Neutron diffraction Phase diagrams Phase separation Physics - Strongly Correlated Electrons Pressure dependence Temperature Temperature dependence |
| title | Pressure induced magnetic phase separation in La\(_{0.75}\)Ca\(_{0.25}\)MnO\(_{3}\) manganite |
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