Structure of magnetite (Fe3O4) above the Curie temperature: A cation ordering study. Phys Chem Minerals, 2012;39:169-76.Levy, D., Guistetto, R., Hoser, A.: Structure of magnetite (Fe3O4) above the Curie temperature: a cation ordering study. Phys. Chem. Miner. 39, 169 (2012)...
Fig5CurietemperatureoffineparticlesofFe304 asafunctionofthediameterd 4 结论 用共沉淀法制备的Fe.O 超细微粒粒径为5～ 43nm.在磁性测试中,发现居里温度随着粒径的 XlmUm 减小而降低.对于平均粒径为43nm 的超细微粒子对 应为848K,平均粒径为5nm 的超细微粒子对应 ...
L-serine, L-proline, and L-cysteine) as stabilizing agents. The synthesis of Fe3O4@AA started from Fe2+, Fe3+inorganic precursors and AA, carefully controlling the reaction parameters (precursor concentration, pH, temperature, etc.).
L-serine, L-proline, and L-cysteine) as stabilizing agents. The synthesis of Fe3O4@AA started from Fe2+, Fe3+inorganic precursors and AA, carefully controlling the reaction parameters (precursor concentration, pH, temperature, etc.).
Owing to high Curie temperature, semi-metallic properties, low toxicity, corrosion stability, magnetic adjustable and other advantages, the Fe3O4-based composites are considered to be the most suitable candidates for absorbent materials, especially the Fe3O4-carbon-based materials. Recently, Jian et...
prompting investigation of other systems. The Curie temperature of MnFe2O4, which is proportional to the exchange stiffness, is 300 °C, compared with 585 °C for Fe3O4. The bulk magnetocrystalline anisotropy is lower than that of Fe3O423, unlike CoFe2O4, where the high anisotropy ...
AbstractAbstractHalf-metallicmagnetiteFe304,asaferrimagneticmaterialpossessthehighCurietemperature,highpolarizationattheFermilevelandmatchedconductivitywithsemiconductor whichisbelievedtobeoneofthemostpromisingmaterialsforspintronicapplicationsand has attracted great attention recently in the area of condensed matter physics...
Fe3O4is a magnetic oxide exhibiting ferrimagnetic property with a Curie temperature of 585 °C [25], low toxicity and relatively low cost. Fe3O4nanoparticles (50 to 100 nm, purity >97 %) were purchased from Sigma Aldrich. The glass chosen for the matrix has the following stochiomet...
The low field DC magnetization measurements of Fe3O4 nanostructures shows an anomalous magnetic behaviour, which indicates the presence of Griffiths﹍ike phase above its curie temperature. This unusual behaviour is attributed to the presence of short‐range magnetic correlations and ferromagnetic clusters...
Once the sample is poled with a DC field of 10 kV/cm, the resistivity decreases dramatically over a broad temperature range, with a visible reduction in the Verwey temperature of , 8 K. The large resistance change is more clearly visible in the inset of Fig. 2(c) (linear scale for ...