Known ferrimagnetic materials include yttrium iron garnet (YIG); cubic ferrites composed of iron oxides with other elements such as aluminum, cobalt, nickel, manganese, and zinc; and hexagonal ferrites such as PbFe12O19 and BaFe12O19 and pyrrhotite, Fe1−xS.
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.
What are Ferri and antiferromagnetic materials?
Ferrimagnetism and antiferromagnetism are two magnetic properties of materials. In contrast to antiferromagnetic materials, ferrimagnetic materials are strongly attracted to a magnetic field. Paramagnetism, ferromagnetism and diamagnetism are other magnetic properties of matter.
Is Fe3O4 antiferromagnetic substance?
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.
Why is Fe3O4 Ferrimagnetic?
Fe3O4 is ferrimagnetic at room temperature because in its crystals magnetic numbers of Fe (II) and Fe (III) ions are unequal in magnitude and aligned in antiparallel direction. But when heated at 850 K the arrangement randomized and substance becomes paramagnetic.
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.
What is antiferromagnetism with example?
Antiferromagnetic materials occur commonly among transition metal compounds, especially oxides. 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 are the 3 types of magnetic materials?
Most materials are classified either as ferromagnetic, diamagnetic or paramagnetic.
- Ferromagnetic. Ferromagnetic materials have some unpaired electrons in their atoms and therefore generate a net magnetic field, albeit a very weak one. …
- Diamagnetic. …
What is superparamagnetic material?
Superparamagnetism is a property occurring principally in small, single-domain magnetic particles without magnetic memory. … Unlike ferromagnetic materials, therefore, superparamagnetic substances do not retain any net magnetization once the external field has been removed. In other words, they have no magnetic memory.
Which describes a ferromagnetic material?
Ferromagnetic materials, such as iron, are those that exhibit strong magnetic effects. The atoms in ferromagnetic materials act like small magnets (due to currents within the atoms) and can be aligned, usually in millimeter-sized regions called domains.
What is antiferromagnetic substance?
Antiferromagnetism, type of magnetism in solids such as manganese oxide (MnO) in which adjacent ions that behave as tiny magnets (in this case manganese ions, Mn2+) spontaneously align themselves at relatively low temperatures into opposite, or antiparallel, arrangements throughout the material so that it exhibits …
Is NI ferromagnetic?
The element Nickel (Ni) is one of the few ferromagnetic metals. Ferromagnetic means they are attracted to magnets and can be magnetized themselves. Most metals aren’t magnetic with the exception of iron, nickel, cobalt, gadolinium, neodymium and samarium.
Is mno2 antiferromagnetic substance?
The ground state of α-MnO2 is antiferromagnetic due to the symmetric nature of Mn-O-Mn bonds. However, α-MnO2 nanorods prepared through a hydrothermal method using KMnO4 as the precursor have been discovered to show ferromagnetic-like behaviour at very low temperatures (i.e. 5 K)18,19,20,21,22.
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 meant by Ferrimagnetism?
Ferrimagnetism, type of permanent magnetism that occurs in solids in which the magnetic fields associated with individual atoms spontaneously align themselves, some parallel, or in the same direction (as in ferromagnetism), and others generally antiparallel, or paired off in opposite directions (as in …
What is difference between antiferromagnetism and Ferrimagnetism?
The major similarity between ferri- and antiferromagnetism is that they both experience superexchange behavior between ions that causes their magnetic moments to be antiparallel. The major difference between the two is that the net magnetic moment of the former is non-zero while in the latter it is zero.