Nanoscale Metastable ε-FeN Ferromagnetic Materials by Self-Sustained Reactions.

08:00 EDT 12th April 2019 | BioPortfolio

Summary of "Nanoscale Metastable ε-FeN Ferromagnetic Materials by Self-Sustained Reactions."

A single-step method for the preparation of metastable ε-FeN nanoparticles by combustion of reactive gels containing iron nitrate (Fe(NO)) and hexamethylenetetramine (CHN) in an inert atmosphere is reported. The results of Fourier transform infrared spectroscopy (FTIR) and thermal analysis coupled with dynamic mass spectrometry revealed that the exothermic decomposition of a coordination complex formed between Fe(NO) and HMTA is responsible for the formation of ε-FeN nanoscale particles with sizes of 5-15 nm. The magnetic properties between 5 and 350 K are characterized using a superconducting quantum interference device (SQUID) magnetometer, revealing a ferromagnetic behavior with a low-temperature magnetic moment of 1.09 μ/Fe, high room temperature saturation magnetization (∼80 emu/g), and low remanent magnetization (∼15 emu/g). The obtained value for the Curie temperature of ∼522 K is close to that (∼575 K) for bulk ε-FeN reported in the literature.


Journal Details

This article was published in the following journal.

Name: Inorganic chemistry
ISSN: 1520-510X


DeepDyve research library

PubMed Articles [9472 Associated PubMed Articles listed on BioPortfolio]

Linear Complexions: Metastable Phase Formation and Coexistence at Dislocations.

The unique three-phase coexistence of metastable B2-FeNi with stable L1_{0}-FeNi and L1_{2}-FeNi_{3} is discovered near edge dislocations in body-centered cubic Fe-Ni alloys using atomistic simulation...

Superior removal of selenite by periclase during transformation to brucite under high-pH conditions.

The sorption of selenite (Se(IV)) at trace (sub-ppm) to high concentrations on periclase (MgO) under high-pH conditions (pH > 10) was examined by macroscopic sorption experiments and nanoscale sol...

Controllable Covalent-bound Nano-Architectures from DNA Frames.

Could one manipulate nanoscale building blocks using chemical reactions like molecular synthesis to yield new supra-nanoscale objects? The precise control over the final architecture might be challeng...

Robust Twin Pairs of Weyl Fermions in Ferromagnetic Oxides.

The ferromagnetic Weyl semimetals with inversion symmetry usually possess odd pairs of Weyl fermions. Here, we present an inversion eigenvalue argument to dictate the existence of even pairs of ferrom...

Allergic-like contrast media reaction management in children.

The use of contrast materials as part of imaging examinations is common in children of all ages, as these compounds increase image contrast, lesion detection and lesion characterization. Though modern...

Clinical Trials [2177 Associated Clinical Trials listed on BioPortfolio]

National Active Surveillance Network and Pharmacogenomics of Adverse Drug Reactions in Children

The purpose of the study is (1) to identify and collect samples from children who take drugs and have adverse drug reactions AND children who take drugs and do not experience any adverse d...

Validation of Ferromagnetic Tracer in Melanoma Sentinel Node

This study has been designed to validate a non-radioactive method to identify the sentinel lymph node using a superparamagnetic iron-oxide (SPIO) tracer respect to the traditional isotopic...

Drug Use Investigation of Jzoloft.

The objective of this surveillance is to collect information about 1) adverse drug reactions not expected from the LPD (unknown adverse drug reactions), 2) the incidence of adverse drug re...

Evaluating Materials to Educate Patients About Cervical Dysplasia

Primary Objective: To pilot test high and low literacy patient education materials for colposcopy clinic patients, assessing impact on patient knowledge and patient feedback about the mat...

Drug Use Investigation Of Gabapentin

The objective of the this surveillance is to collect information about 1)adverse drug reactions not expected from the LPD (unknown adverse drug reactions), 2) the incidence of adverse drug...

Medical and Biotech [MESH] Definitions

Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.

The transport of materials through a cell. It includes the uptake of materials by the cell (ENDOCYTOSIS), the movement of those materials through the cell, and the subsequent secretion of those materials (EXOCYTOSIS).

An interdisciplinary study of the microstructure and composition of various materials such as metals, semiconductors, ceramics, and polymers, in relation to their macromolecular physical and chemical properties. Materials science enables the custom creation of new materials with specific properties and uses.

The development and use of techniques and equipment to study or perform chemical reactions, with small quantities of materials, frequently less than a milligram or a milliliter.

Substances used to create an impression, or negative reproduction, of the teeth and dental arches. These materials include dental plasters and cements, metallic oxide pastes, silicone base materials, or elastomeric materials.

Quick Search


DeepDyve research library

Searches Linking to this Article