Copyright 1996-2012 Researchpub.org. All rights Reserved. 18 Abstract— The effect of strontium dopping on magnetic properties of neodymium orthoferrimanganites have been investigated using neutron diffraction and MÖssbauer spectroscopy. All samples prepared using solid state reaction from pure oxides. The XRD reflections exhibited single phase structure of both samples. The neutron diffraction...

Known antiferronlagnetic nlaterials far out nwnber known ferronlagnetic and ferrinlagnetic nlaterials. More­ over, the antife rronlagnets display a wide variety of phase transitions in addition to the paranlagnetic to antiferro­ nlagnetic transition at the Neel point, that nlake thenl a rich source of infornlation about the relations hip between exchange interactions, structure, and phase trans...

Development of low-cost, high-performance catalysts for the effective degradation organic dyes is both fundamental and technological significance environmental remediation. Herein, FeN4-doped carbon nanotubes exhibit a remarkable catalytic activity towards acid orange 7 (AO7) in presence peroxymonosulfate (PMS). This accounted by abundant well-dispersed FeN4 sites appropriate adsorption energy....

An investigation has been made of alloys of 50 to 6 300 ppm Eu in Mg. Data obtained by the use of the Mossbauer spectroscopy of IslEu, magnetic susceptibility and scanning electron microscopy show that solid solutions do not form in this system, but that the Eu precipitates into two eutectic intermetallics. While the Eu ions are in a divalent state at all temperatures for strain-free samples, i...

A method for mounting a He closed-cycle cryostat which consists of an exchange gas envelope around the cold head to cool an independently supported sample mount as in model DE202 with a DMX-20 interface from APD Cryogenics, Inc. is described. No detectable vibration of the sample mount is observed as evaluated using 57Fe Mossbauer spectroscopy and a piezoelectric accelerometer. Using a 25 ,um t...

Magnetic drug targeting is a drug delivery system applicable to cancer treatment. Coated magnetic particles, called carriers, are very useful for delivering chemotherapeutic drugs. In the present research, casein-coated iron oxide nanocarriers (CCIONPs) of core shell nanostructure have been described as being applicable to magnetic drug targeting. The structure, morphology, and composition of p...

-Mixtures of synthetic Al-substituted goethite (a-Feo.814AloA86OOH) and hematite (a-Fel.658Alo.34203) (75, 50, 25, 3~ hematite by weight) were studied by M6ssbauer spectroscopy to evaluate the use of that technique for quantitative analysis. M6ssbauer spectra for these mixtures, obtained in the temperature range 12-130 K, were better fitted by a distribution of magnetic fields than by two magne...

The putative [6Fe-6S] prismane cluster in the 6-Fe/S-containing protein from Desulfovibrio vulgaris, strain Hildenborough, has been enriched to 80% in "Fe, and has been characterized in detail by S, X-, Pand Q-band EPR spectroscopy, parallel-mode EPR spectroscopy and high-resolution 57Fe Mossbauer spectroscopy. In EPR-monitored redox-equilibrium titrations, the cluster is found to be capable of...

-As part of the characterization of a Tunisian red soil profile, six samples, taken at different depths, were investigated by MSssbauer spectroscopy at room temperature and at 80 K to obtain information about the various types of Fe oxides present. By considering magnetic hypertine field distributions, the spectra of goethite and hematite were well resolved. Chemical analyses of the samples rev...