The magnetic interaction among iron ions at octahedral and tetrahedral sites is antiferromagnetic and that among octahedral ions is ferromagnetic; overall a ferrimagnetic arrangement of Fe3O4. Therefore, the net magnetic moment in Fe3O4 is due to Fe2+ ions (4 μB).
What is Fe3O4 used for?
Among other industries, Iron oxide Fe3O4 nanoparticles are used as magnetic data storage, biosensors, drug-delivery, ferrofluids, magnetic coatings, EM-waves absorbing coatings, wastewater purification.
Is Fe3O4 antiferromagnetic in nature?
Iron(II,III) oxide is the chemical compound with formula Fe3O4. It occurs in nature as the mineral magnetite.
What is the difference between Fe2O3 and Fe3O4?
What is the difference between Fe2O3 and Fe3O4? They are ferrous oxides. Thus, Fe2O3 is a simple oxide where Fe is only + 3 in the oxidation state thus Fe3O4 is a mixed oxide where Fe is present in both + 2 and + 3 oxidation states. … Fe2O3 is written as iron oxide (II) while Fe3O4 is written as iron oxide (II, III).
What is Ferrimagnetism example?
Ferrimagnetism is the magnetism of the oxides of the ferromagnetic elements. These are variously called ferrites and garnets. The basic ferrite is magnetite (Fe3O4) which can be written as FeO · Fe2O3.
How do you get Fe3O4?
Under anaerobic conditions, ferrous hydroxide (Fe(OH)2) undergoes oxidation with water to form magnetite and molecular hydrogen. This process is explained by the Schikorr reaction.
What is Fe2O3 called?
Is CrO2 antiferromagnetic?
Chromium dioxide (CrO2) offers a rare example of metallic ferromagnetism among stoichiometric transition-metal oxides. … The ferromagnetism reemerges if, besides conventional kinetic energy changes in the t2g band, to consider other mechanism, involving direct exchange and magnetic polarization of the oxygen band.
Is iron oxide ferromagnetic?
It occurs naturally as the mineral maghemite. It is ferromagnetic and finds application in recording tapes, although ultrafine particles smaller than 10 nanometers are superparamagnetic. It can be prepared by thermal dehydratation of gamma iron(III) oxide-hydroxide.
Is ZnFe2O4 antiferromagnetic?
Bulk ZnFe2O4 exhibiting normal spinel structure is a weak antiferromagnet with a Neél-temperature of 10.5 K , while epitaxial ZnFe2O4 thin films exhibit a higher Néel temperature of 43 K .
What is the common name of Fe3O4?
Ferrosoferric oxide is an iron oxide. Iron (II,III) oxide (Fe3O4). It is a black ore of IRON that forms opaque crystals and exerts strong magnetism.
How do you convert Fe2O3 to Fe3O4?
Theoretically, Fe2O3 the in system can be converted into Fe3O4 completely by adding Fe with only 8.75% Fe2O3 (mass fraction). That is to say, a small amount of Fe powder can make Fe2O3 transform into Fe3O4 completely in alkaline aqueous solution.
What is the oxidation state of iron in Fe3O4?
Hence the oxidation number of Fe in Fe3O4 are +2 and +3 respectively.
Is MgFe2O4 Ferrimagnetic?
Magnesium ferrite (MgFe2O4) is one of the important and versatile spinel ferrite (usually written as (Mg1-xFex)[MgxFe2-x]O4) having low saturation magnetization value, high resistivity and reproducible characteristics. … The temperature versus magnetization curve shows the ferromagnetic to paramagnetic transition.
Which material is very antiferromagnetic?
Examples include hematite, metals such as chromium, alloys such as iron manganese (FeMn), and oxides such as nickel oxide (NiO). There are also numerous examples among high nuclearity metal clusters.
What is the difference between ferromagnetic and ferrimagnetic?
Some magnetic domains in a ferrimagnetic material point in the same direction and some in the opposite direction. However, in ferromagnetism they all point in the same direction.