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http://hdl.handle.net/2005/880
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| Title: | An Investigation Of The Ferromagnetic Insulating State Of Manganites |
| Authors: | Jain, Himanshu |
| Advisors: | Raychaudhuri, A K |
| Keywords: | Manganites - Ferromagnetic Insulation
Manganites
Hole Doped Manganites
Ferromagnetic and Insulating Manganites
Colossal Electroresistance
Colossal Magnetoresistance
Non-linear Conductance
Manganites - Electrical Conductance
Ferromagnetic Insulation
Shklovskii-Efros Variable Range Hopping (SE–VRH)
Ferromagnetic Insulating (FMI) |
| Submitted Date: | Jul-2008 |
| Series/Report no.: | G22626 |
| Abstract: | Electrical conductance in the ferromagnetic insulating (FMI) phase of manganites has been experimentally investigated. The investigations were performed on single crystals of compositions La0.82Ca0.18MnO3 and Nd0.7Pb0.3MnO3. The nature of electrical conductance is determined to be Shklovskii–Efros variable range hopping (SE–VRH). Further, at high bias levels, non–linear conductance (NLC) is observed. A “hot electron” model, that quantitatively explains the bias and temperature dependence of the NLC, consistent with the SE–VRH nature of electrical conductance, is presented. The limits of validity of the model are discussed. |
| URI: | http://hdl.handle.net/2005/880 |
| Appears in Collections: | Physics (physics)
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