Using time-resolved far-infrared spectroscopy, we observe multiple routes for photoinduced phase transitions in V(2)O(3). This includes (i) a photothermal antiferromagnetic to paramagnetic transition and (ii) an incipient strain-generated paramagnetic metal to paramagnetic insulator transition, which manifests as coherent oscillations in the far-infrared conductivity. The ∼100 ps conductivity o...

Observations of weak, relatively sharp electron-spin resonance signals in a variety of lyophilized biological materials have been reported by Commoner, Townsend. and Pake.1 Studies at Duke University2 have shown that similar signals can be produced in numerous organic chemicals, including biological substances, by X-irradiation in oxygen or by the admission of oxygen to samples which had previo...

NMR experiments and tools for the characterization of the structure and dynamics of paramagnetic proteins are presented here. The focus is on the importance of (13)C direct-detection NMR for the assignment of paramagnetic systems in solution, on the information contained in paramagnetic effects observed both in solution and in the solid state, and on novel paramagnetism-based tools for the inve...

To elucidate the role played by the transition-metal ion in the pnictide materials, we compare the electronic and magnetic properties of BaFe2As2 with BaMn2As2. To this end we employ the LDA+Gutzwiller method to analyze the mass renormalizations and the size of the ordered magnetic moment of the two systems. We study a model that contains all five transition-metal 3d orbitals together with the ...

Using the Becke-3-LYP functional, we have performed band structure calculations on the high temperature superconductor parent compound, La2CuO4. For the restricted spin paramagnetic case (ρ↑ = ρ↓), the B3LYP band structure agrees well with the standard LDA band structure. It has a metallic ground state with a single Cu x−y/O pσ band crossing the Fermi level. For the unrestricted spin case (ρ↑ 6...

The average paramagnetic susceptibilities of the RE ions in RE oxybromide powders, REOBr (RE = Ce Nd, Sm, Eu, Tb Yb), were simulated between 2 and 298 K by calculations based on the modified point charge (PCEM) model. The method used employs the detailed structure data determined from the Rietveld analyses of the X-ray powder patterns which were measured using an ordinary laboratory set-up. The...

The spectroscopic studies of transition metal complexes of iron. metal complexes, are characterized by XRD, FTIR, H NMR, Mössbauer and VSM (vibrating sample magnetometer) measurements, are reported in the present paper. The XRD analysis reveals the crystalline nature of all the compounds. Mössbauer study interprets paramagnetic nature of complexes at room temperature. VSM measurements also reve...

the magnetisation and electron spin resonance (esr) spectrum of two specimens of tetrahedral amorphous carbon (ta-c), deposited from a filtered cathodic arc, were measured over a wide temperature range. the magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. the superparamagnetic contribution resembled that recently found in carbon prepared from ...