نتایج جستجو برای: manganite
تعداد نتایج: 964 فیلتر نتایج به سال:
Charge-lattice fluctuations are observed in the layered perovskite manganite LaSr2Mn2O7 by Raman spectroscopy at temperatures as high as 340 K, and with decreasing temperature they become static, forming a charge-ordered ~CO! phase below TCO5210 K. In the static regime, superlattice reflections are observed by neutron and x-ray diffraction with a propagation vector ~1/4, 21/4, 0!. Crystallograp...
We present a detailed magnetothermal study of Pr0.7Ca0.3MnO3, a perovskite manganite in which an insulator-metal transition can be driven by magnetic field, but also by pressure, visible light, x-rays, or high currents. We find that the field-induced transition is associated with a large release of energy which accounts for its strong irreversibility. In the ferromagnetic metallic state, specif...
Manganites are considered as subbranches of condensed matter physics with a great wealth of physical mechanisms. In this investigation we have studied the structural, electrical and magnetic properties of a series of La1-xCaxMnO3 manganite with x=0.1, 0.2, …,0.5. We observed that the crystal structure of this manganite, with small dopping, at room temperature is orthorhombic and by increasi...
The ability to tune magnetic ordering in complex oxide based correlated antiferromagnetic insulators, due the coupling between charge, spin, lattice, and orbital degrees of freedom, opens a vast playground spintronics. Here, we study tensile strain induced coexistence wide range ordering, as established from temperature dependence spin Hall magnetoresistance (SMR) Seebeck effect (SSE) studies c...
We report our recent study on the pulsed laser deposition process in the synthesis of colossal magnetoresistive MgO/LaCaMnO3 and MgO/LaSrMnO3 core-shell nanowires. A highly efficient process has been developed by depositing an epitaxial layer of manganite onto randomly oriented MgO nanowires grown on SiO2/Si substrates. In addition, in-depth studies revealed that the sample-target distance play...
Using angle-resolved photoemission, we have observed sharp quasiparticlelike peaks in the prototypical layered manganite La(2-2x)Sr(1+2x)Mn(2)O(7) (x=0.36,0.38). We focus on the (pi,0) regions of k space and study their electronic scattering rates and dispersion kinks, uncovering bilayer-split bands, the critical energy scales, momentum scales, and strengths of the interactions that renormalize...
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