Colossal enhancement of magnetoresistance in La 0.67 Sr 0.33 MnO 3 /Pr 0.67 Ca 0.33 MnO 3 multilayers: Reproducing the phase separation scenario
13
Citation
29
Reference
10
Related Paper
Citation Trend
Abstract:
Colossal enhancement of magnetoresistance has been achieved over a broad temperature range which extends upto the room temperature, in ferromagnetic metal-charge ordered insulator manganite multi-layers. The artificially created phase coexistence in the multilayers reproduce the characteristic signatures of metastability in the magnetotransport properties commonly observed in electronically phase-separated manganites.Keywords:
Manganite
Colossal Magnetoresistance
Charge ordering
Metastability
Atmospheric temperature range
Metal–insulator transition
Manganite
Colossal Magnetoresistance
Cite
Citations (0)
Manganite
Colossal Magnetoresistance
Atmospheric temperature range
Magnetic refrigeration
Cite
Citations (3)
Conductivity data for La2-2xSr1+2xMn2O7 (x=0.6) show a first-order transition from an orbital- or charge-ordered insulator to a metal as the temperature falls below similar to 160 K. The change in conductivity is 100 times larger than that seen previously in any single-phase manganite in zero field. The metallic low-temperature state is similar to x=0.58, but x=0.58 shows no evidence of orbital or charge order. This result supports a conclusion that strongly coupled magnetic-conductive transitions are first order.
Manganite
Metal–insulator transition
Charge ordering
Colossal Magnetoresistance
Cite
Citations (0)
Manganite
Charge ordering
Colossal Magnetoresistance
Atomic units
Cite
Citations (173)
An intrinsic characteristic of the “colossal” magnetoresistance manganite compounds is that the resistance and the magnetoresistance vary strongly with temperature over the small temperature regime in which the magnetoresistance is exceptionally large. We propose a heterostructure constructed of layers of varying composition manganites which extends the regime of large magnetoresistance and greatly broadens the sharp peak in resistance. Data from a prototype heterostructure are presented that demonstrate the effectiveness of this method.
Manganite
Colossal Magnetoresistance
Cite
Citations (3)
The structure and charge ordering (CO) behavior of the three-dimensional colossal magnetoresistive manganite Nd0.5Sr0.5MnO3 have been studied by transmission electron microscopy. The electron diffraction analysis suggested its room temperature structure as orthorhombic, with a Pnma space group. By controlling the experimental temperature setting either above or below the CO transition temperature, it was observed that the CO grew through the propagation of the CO front. The twin boundaries were the barriers of the CO front movement. In heavily ion irradiated samples, it was observed that the CO front was pinned by the intracrystalline defects, forming a zigzag shape interface. Moreover, the electron beam was observed to influence the CO.
Manganite
Charge ordering
Colossal Magnetoresistance
Orthorhombic crystal system
Manganate
Lanthanum manganite
Cite
Citations (5)
Manganite
Colossal Magnetoresistance
Charge ordering
Cite
Citations (44)
Significance Magnetoresistance is the change of resistance in the presence of an external magnetic field. In rare-earth manganite compounds, this change is orders of magnitude stronger than usual and it is promising for developing new spintronic and electronic devices. The colossal magnetoresistance (CMR) effect has been observed only in chemically doped manganite compounds. We report the realization of CMR in a compressed single-valent LaMnO 3 manganite compound. Pressure generates an inhomogeneous phase constituted by two components: a nonconductive one with a unique structural distortion and a metallic one without distortion. The CMR takes place when the competition between the two phases is at a maximum. We identify phase separation as the driving force for generating CMR in LaMnO 3 .
Manganite
Colossal Magnetoresistance
Distortion (music)
Cite
Citations (84)
Colossal enhancement of magnetoresistance has been achieved over a broad temperature range which extends upto the room temperature, in ferromagnetic metal-charge ordered insulator manganite multi-layers. The artificially created phase coexistence in the multilayers reproduce the characteristic signatures of metastability in the magnetotransport properties commonly observed in electronically phase-separated manganites.
Manganite
Colossal Magnetoresistance
Charge ordering
Metastability
Atmospheric temperature range
Metal–insulator transition
Cite
Citations (13)
Large single crystals of the lead-doped colossal magnetoresistance (CMR) manganite compound RE0.67Sr0.01Pb0.32MnO3 RE = (Nd, Pr, La), have been grown using a flux solution of PbF2 and PbO. The perovskite cubic structure has been identified by X-ray diffraction (XRD). Resistance measurements have been performed in magnetic fields of 0, 2 and 7 T. All crystals exhibit a sharp transition from a paramagnetic and insulating to a ferromagnetic and metallic behavior. The Curie temperature of our lead-doped crystals is significantly higher than that of either the Sr- or Ca-doped systems. The magnetotransport properties, however, are very similar, exhibiting CMR effects. Preliminary results of ellipsometric measurements of the far-infrared conductivity are reported for the La and Nd compounds.
Manganite
Colossal Magnetoresistance
Cite
Citations (0)