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DC Field | Value | Language |
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dc.contributor.author | Rao, C N R | - |
dc.contributor.author | Mahesh, R | - |
dc.contributor.author | Raychaudhuri, A K | - |
dc.contributor.author | Mahendiran, R | - |
dc.date.accessioned | 2012-11-23T11:28:54Z | - |
dc.date.available | 2012-11-23T11:28:54Z | - |
dc.date.issued | 1998-04 | - |
dc.identifier | 0022-3697 | en_US |
dc.identifier.citation | Journal Of Physics And Chemistry Of Solids 59(4), 487-501 (1998) | en_US |
dc.identifier.uri | https://libjncir.jncasr.ac.in/xmlui/10572/1065 | - |
dc.description | Proceedings Paper. Restricted Access. | en_US |
dc.description.abstract | Giant magnetoresistance (GMR) and related properties of manganate perovskites of the general formula Lnl − xAxMnO3 (Ln = rare earth; A = divalent ion) are discussed in detail. There is a fine interplay of magnetic exchange, structural properties and electronic transport in these materials which gives rise to several novel properties. The manganates are ferromagnetic at or above a certain value of x (or Mn4+ content) and become metallic at temperatures below the curie temperature, Tc. This behavior is attributed to double-exchange. GMR is generally a maximum close to Tc or the insulator-metal (I-M) transition temperature, Tim. The Tc and %MR are markedly affected by the size of the A site cation, 〈 rA 〉, thereby affording a useful electronic phase diagram when Tc or Tim is plotted against 〈 rA 〉 or pressure. The commonalities and correlations found in the properties of manganates are examined along with certain unusual features in the electron-transport properties of these materials. Some of the Ln1 − xAxMnO3 compositions exhibit charge-ordering and related effects. Charge ordering is crucially dependent on 〈 rA 〉 or the eg band width and the charge-ordered insulating state transforms to a metallic ferromagnetic state on the application of a magnetic field, charge-ordering and double-exchange being competing interactions. | en_US |
dc.description.uri | http://dx.doi.org/10.1016/S0022-3697(97)00203-5 | en_US |
dc.language.iso | en | en_US |
dc.publisher | Pergamon Elsevier Science Ltd | en_US |
dc.rights | © 1998 Elsevier Science Ltd | en_US |
dc.subject | electrical properties | en_US |
dc.subject | magnetic properties | en_US |
dc.subject | Insulator-Metal Transition | en_US |
dc.subject | Double-Exchange Ferromagnet | en_US |
dc.subject | Colossal-Magnetoresistance | en_US |
dc.subject | Manganese Oxides | en_US |
dc.subject | Doped Lamno3 | en_US |
dc.subject | Transport-Properties | en_US |
dc.subject | Electronic-Structure | en_US |
dc.subject | Magnetic-Field | en_US |
dc.subject | Phase-Diagram | en_US |
dc.subject | La1-Xsrxmno3 | en_US |
dc.title | Giant Magnetoresistance, Charge Ordering And Other Novel Properties Of Perovskite Manganates | en_US |
dc.type | Article | en_US |
Appears in Collections: | Research Papers (Prof. C.N.R. Rao) |
Files in This Item:
File | Description | Size | Format | |
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sl.no26.1998.J. Ph.vs Chem Sol 59(4). 487-502..pdf Restricted Access | 1.42 MB | Adobe PDF | View/Open Request a copy |
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