Weak ferromagnetic component in goethite (α-FeOOH) and its relation with microstructural characteristics

Polycrystalline samples of [Formula: see text] [Formula: see text] have been synthesized and characterized by X-ray diffraction (XRD), electrical resistivity, thermoelectric power and magnetization measurements. Resistivity measurements revealed that the onset transition temperature [Formula: see text] decreased slightly from [Formula: see text] for [Formula: see text] to [Formula: see text] for [Formula: see text]. Magnetization measurements showed that the partial substitution of [Formula: see text] by [Formula: see text] leads to a significant decrease in the magnetic ordering temperature. A suppression of the weak ferromagnetic component of the field-cooled (FC) magnetization with [Formula: see text]-doping content was also observed for the samples with [Formula: see text]. The changes in the superconducting transition temperature, the magnetic ordering temperature and the weak ferromagnetic component of the FC magnetization are discussed in conjunction with the change in hole concentration and the local structural changes in the Ru sublattice induced by [Formula: see text] doping, based on the Rietveld refinements of the XRD data.

Download Full-text

Synthesis and characterization of Na0.3RhO2·0.6H2O—a semiconductor with a weak ferromagnetic component

Solid State Communications ◽

10.1016/j.ssc.2005.03.063 ◽

2005 ◽

Vol 135 (1-2) ◽

pp. 51-56 ◽

Cited By ~ 12

Author(s):

S. Park ◽

K. Kang ◽

W. Si ◽

W.-S. Yoon ◽

Y. Lee ◽

...

Keyword(s):

Synthesis And Characterization ◽

Ferromagnetic Component ◽

Weak Ferromagnetic

Download Full-text

Evaluating Micro-Structure, Hydration and Thermal Expansions of Cement Containing Nano-Silica

GIS Business ◽

10.26643/gis.v15i1.18226 ◽

2020 ◽

Vol 15 (1) ◽

pp. 158-165 ◽

Cited By ~ 1

Author(s):

Dr. Sarvesh PS Rajput

Keyword(s):

Portland Cement ◽

Mechanical Characteristics ◽

Microstructural Properties ◽

Nano Silica ◽

Micro Structure ◽

Microstructural Characteristics ◽

Mechanical And Microstructural Properties

This study reported that the addition of nano-silica enhances the mechanical characteristics of concrete as its compressive, flexural and tensile split strengths are increased. As a comparison mixture to equate it along with nano-modified concrete, ordinary samples of Portland cement (OPC) have been utilized. Herein, upto 6.0 percent of OPC has been substituted by nanosilica. In fact, the introduction of nanosilica improves mechanical and microstructural characteristics of concrete by significantly (28 to 35%). The finding therefore, indicated that partly replacing OPC with up to 5 percent nanosilica increases the mechanical and microstructural properties cured up to ninety days as opposed to the standard OPC mix.

Download Full-text