Pressure-induced colossal piezoresistance effect and the collapse of the polaronic state in the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7
We have investigated the effect of hydrostatic pressure as a function of temperature on the resistivity of a single crystal of the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7. Whereas a strong insulating behaviour is observed at all temperatures at ambient pressure, a clear transition into a metalli...
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| Veröffentlicht in: | Journal of physics. Condensed matter 2012-04, Vol.24 (13), p.1-12 |
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| creator | Thiyagarajan, R Manivannan, N Arumugam, S Esakki Muthu, S Tamilselvan, N R Sekar, C Yoshino, H Murata, K Apostu, M O Suryanarayanan, R Revcolevschi, A |
| description | We have investigated the effect of hydrostatic pressure as a function of temperature on the resistivity of a single crystal of the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7. Whereas a strong insulating behaviour is observed at all temperatures at ambient pressure, a clear transition into a metallic-like behaviour is induced when the sample is subjected to a pressure (P) of ∼1.0 GPa at T < 70 K. A huge negative piezoresistance ∼106 in the low temperature region at moderate pressures is observed. When the pressure is increased further (5.5 GPa), the high temperature polaronic state disappears and a metallic behaviour is observed. The insulator to metal transition temperature exponentially increases with pressure and the distinct peak in the resistivity that is observed at 1.0 GPa almost vanishes for P > 7.0 GPa. A modification in the orbital occupation of the eg electron between 3dx2−y2 and 3dz2−r2 states, as proposed earlier, leading to a ferromagnetic double-exchange phenomenon, can qualitatively account for our data. |
| doi_str_mv | 10.1088/0953-8984/24/13/136002 |
| format | Article |
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Whereas a strong insulating behaviour is observed at all temperatures at ambient pressure, a clear transition into a metallic-like behaviour is induced when the sample is subjected to a pressure (P) of ∼1.0 GPa at T < 70 K. A huge negative piezoresistance ∼106 in the low temperature region at moderate pressures is observed. When the pressure is increased further (5.5 GPa), the high temperature polaronic state disappears and a metallic behaviour is observed. The insulator to metal transition temperature exponentially increases with pressure and the distinct peak in the resistivity that is observed at 1.0 GPa almost vanishes for P > 7.0 GPa. 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Condensed matter</title><addtitle>JPhysCM</addtitle><addtitle>J. Phys.: Condens. Matter</addtitle><description>We have investigated the effect of hydrostatic pressure as a function of temperature on the resistivity of a single crystal of the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7. Whereas a strong insulating behaviour is observed at all temperatures at ambient pressure, a clear transition into a metallic-like behaviour is induced when the sample is subjected to a pressure (P) of ∼1.0 GPa at T < 70 K. A huge negative piezoresistance ∼106 in the low temperature region at moderate pressures is observed. When the pressure is increased further (5.5 GPa), the high temperature polaronic state disappears and a metallic behaviour is observed. The insulator to metal transition temperature exponentially increases with pressure and the distinct peak in the resistivity that is observed at 1.0 GPa almost vanishes for P > 7.0 GPa. A modification in the orbital occupation of the eg electron between 3dx2−y2 and 3dz2−r2 states, as proposed earlier, leading to a ferromagnetic double-exchange phenomenon, can qualitatively account for our data.</description><subject>Condensed matter</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Electrical resistivity</subject><subject>Exact sciences and technology</subject><subject>Ferromagnetism</subject><subject>Insulators</subject><subject>Magnetic properties and materials</subject><subject>Magnetotransport phenomena, materials for magnetotransport</subject><subject>Manganites</subject><subject>Occupation</subject><subject>Physics</subject><subject>Piezoresistance</subject><subject>Transition temperature</subject><issn>0953-8984</issn><issn>1361-648X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNo9kd9KHDEUxkOx4Gr7CpIbQS9mNv9mNnMpYm1hRaEt9C6cyZzUyGwyJjMX9hX60mZdEQInOd-PQ77vEHLGWc2Z1mvWNbLSnVZrodZcltMyJj6RVbnwqlX6zxFZfUDH5CTnJ8aY0lKtyP-HhDkvCSsfhsXiQG0cY84w0snjv1hUn2cIFik6h3amEAY6P-KeG2HKSKN7e09xhBSDt7TwM1If3tq9H-EFE91B-AvBF-FiC6xWD4nV7SWvxc_Ea30XxP3mC_nsYMz49b2ekt_fbn5df6-297c_rq-2leesZVXPO7DWKYfCKt5vQBQnEttBgC6Csg5Vb12HXSv7rofybcZcx9nQqQ0frDwlF4e5U4rPC-bZ7Hy2WOwEjEs2vBUlHt5oVtDzdxSyhdGlkoTPZkp-B-nFiGbTKN3IwokD5-NknuKSQjFgODP7DZl9-GYfvhHKcGkOG5KvhWOEfg</recordid><startdate>20120404</startdate><enddate>20120404</enddate><creator>Thiyagarajan, R</creator><creator>Manivannan, N</creator><creator>Arumugam, S</creator><creator>Esakki Muthu, S</creator><creator>Tamilselvan, N R</creator><creator>Sekar, C</creator><creator>Yoshino, H</creator><creator>Murata, K</creator><creator>Apostu, M O</creator><creator>Suryanarayanan, R</creator><creator>Revcolevschi, A</creator><general>IOP Publishing</general><general>Institute of Physics</general><scope>IQODW</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20120404</creationdate><title>Pressure-induced colossal piezoresistance effect and the collapse of the polaronic state in the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7</title><author>Thiyagarajan, R ; Manivannan, N ; Arumugam, S ; Esakki Muthu, S ; Tamilselvan, N R ; Sekar, C ; Yoshino, H ; Murata, K ; Apostu, M O ; Suryanarayanan, R ; Revcolevschi, A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i1060-b19accf4fe2c41b7a28343e6d2a8acc4cfe4bcf9e963b9baffe00f910d9471dc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Condensed matter</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Electrical resistivity</topic><topic>Exact sciences and technology</topic><topic>Ferromagnetism</topic><topic>Insulators</topic><topic>Magnetic properties and materials</topic><topic>Magnetotransport phenomena, materials for magnetotransport</topic><topic>Manganites</topic><topic>Occupation</topic><topic>Physics</topic><topic>Piezoresistance</topic><topic>Transition temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Thiyagarajan, R</creatorcontrib><creatorcontrib>Manivannan, N</creatorcontrib><creatorcontrib>Arumugam, S</creatorcontrib><creatorcontrib>Esakki Muthu, S</creatorcontrib><creatorcontrib>Tamilselvan, N R</creatorcontrib><creatorcontrib>Sekar, C</creatorcontrib><creatorcontrib>Yoshino, H</creatorcontrib><creatorcontrib>Murata, K</creatorcontrib><creatorcontrib>Apostu, M O</creatorcontrib><creatorcontrib>Suryanarayanan, R</creatorcontrib><creatorcontrib>Revcolevschi, A</creatorcontrib><collection>Pascal-Francis</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of physics. Condensed matter</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Thiyagarajan, R</au><au>Manivannan, N</au><au>Arumugam, S</au><au>Esakki Muthu, S</au><au>Tamilselvan, N R</au><au>Sekar, C</au><au>Yoshino, H</au><au>Murata, K</au><au>Apostu, M O</au><au>Suryanarayanan, R</au><au>Revcolevschi, A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pressure-induced colossal piezoresistance effect and the collapse of the polaronic state in the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7</atitle><jtitle>Journal of physics. Condensed matter</jtitle><stitle>JPhysCM</stitle><addtitle>J. Phys.: Condens. 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The insulator to metal transition temperature exponentially increases with pressure and the distinct peak in the resistivity that is observed at 1.0 GPa almost vanishes for P > 7.0 GPa. A modification in the orbital occupation of the eg electron between 3dx2−y2 and 3dz2−r2 states, as proposed earlier, leading to a ferromagnetic double-exchange phenomenon, can qualitatively account for our data.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/0953-8984/24/13/136002</doi><tpages>6</tpages></addata></record> |
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| subjects | Condensed matter Condensed matter: electronic structure, electrical, magnetic, and optical properties Electrical resistivity Exact sciences and technology Ferromagnetism Insulators Magnetic properties and materials Magnetotransport phenomena, materials for magnetotransport Manganites Occupation Physics Piezoresistance Transition temperature |
| title | Pressure-induced colossal piezoresistance effect and the collapse of the polaronic state in the bilayer manganite (La0.4Pr0.6)1.2Sr1.8Mn2O7 |
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