Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Ferrimagnetism


Related Topics

In the News (Thu 23 Oct 14)

  
  Physics Today June 2002
Shull's obituary, in which he is consistently called "Cliff," says that Shull confirmed antiferromagnetism in manganese oxide, presumably after 1938 (after the "war ended") and confirmed the Néel model for ferrimagnetism for magnetite, probably around 1950, as I interpret it.
Ferrimagnetic materials have magnetic atoms on two inequivalent sites, or two interpenetrating sublattices, with ferromagnetic interactions between atoms on the same sublattice and antiferromagnetic interactions between atoms on different sublattices.
Ferrimagnets exhibit a partial cancellation of moments in opposite directions, resulting in a net magnetization.
www.physicstoday.org /vol-55/iss-6/p10c.html   (535 words)

  
 ferrimagnetism --  Britannica Concise Encyclopedia - The online encyclopedia you can trust!
The magnetic behaviour of single crystals of ferrimagnetic materials may be attributed to the parallel alignment; the diluting effect of those atoms in the antiparallel arrangement keeps the magnetic strength of these materials generally less than that of purely ferromagnetic solids such as metallic iron.
Ferrimagnetism occurs chiefly in magnetic oxides known as ferrites.
The net ferrimagnetism is thus a complex result of antiparallel spin alignment among the three types...
www.britannica.com /ebc/article-9034105   (561 words)

  
 Ferrimagnetism - Wikipedia, the free encyclopedia
In physics, a ferrimagnetic material is one in which the magnetic moment of the atoms on different sublattices oppose as in antiferromagnetism but the opposing moments are unequal and a spontaneous magnetization remains.
However, there is sometimes a temperature below the Neel temperature at which the two sublattices have equal moments, resulting in a net moment of zero, called the compensation point.
The oldest magnetic substance known is the ferrimagnet, magnetite, and it is among the materials that were classified as ferromagnets before Neel's discovery of ferrimagnetism and antiferromagnetism.
en.wikipedia.org /wiki/Ferrimagnetism   (161 words)

  
 Louis Eugène Félix Néel - Wikipedia, the free encyclopedia
His contributions to solid state physics have found numerous useful applications, particularly in the development of improved computer memory units.
About 1930 he suggested that a new form of magnetic behavior might exist; called antiferromagnetism, as opposed to ferrimagnetism.
Néel has also given an explanation of the weak magnetism of certain rocks, making possible the study of the history of Earth's magnetic field.
en.wikipedia.org /wiki/Louis_Eugene_Felix_Neel   (170 words)

  
 Classes of Magnetic Materials
Ferromagnetic and ferrimagnetic materials are usually what we consider as being magnetic (ie., behaving like iron).
In ferrimagnets, the magnetic moments of the A and B sublattices are not equal and result in a net magnetic moment.
The large oxygen ions are close packed in a cubic arrangement and the smaller Fe ions fill in the gaps.
www.geo.umn.edu /orgs/irm/hg2m/hg2m_b/hg2m_b.html   (1459 words)

  
 Expert in: Microwave Devices & Technology
Expert is an expert in the fabrication, engineering, and evaluation of microwave ferrimagnetic materials.
His expertise includes the molecular engineering of these materials to optimize their magnetic and electrical characteristics, for example, to suit them for high power RF applications.
Expert has a strong background in the use of ferrimagnetic and dielectric materials to generate stealth coatings for radar absorption and signature alteration and control (stealth materials).
chemindustry.intota.com /viewbio.asp?bioID=615238&perID=714832   (476 words)

  
 Quantum Ferrimagnetism Based on Organic Biradicals with a Spin-0 Ground State: Numerical Calculations of Molecule-Based ...   (Site not responding. Last check: 2007-10-07)
The possibility of a ferrimagnetic spin alignment in a novel type of alternating heterospin chain is examined in terms of a finite-size Heisenberg spin Hamiltonian.
An extremely short spin-spin correlation length features in the low-spin state, indicating the occurrence of a quantum mechanical disorder resulting from a frustration effect inherent in the chain.
The generalized ferrimagnetic spin alignment proposed in quantum terms uncovers a new category of molecule-based magnetic materials.
pubs.acs.org /cgi-bin/jtext?jpcbfk/105/i15/abs/jp003348p   (247 words)

  
 Ferrimagnetism   (Site not responding. Last check: 2007-10-07)
In physics, a ferrimagnetic material is one in which the magneticmoment of the atoms on different sublattices oppose as in antiferromagnetism but the opposing momentum are unequal and a spontaneous magnetization remains.
However, there is sometimes a temperature below the Neel temperature at which the twosublattices have equal moments, resulting in a net moment of zero, called the compensation point.
The oldest magnetic substance known is the ferrimagnet, magnetite, and it is among the materials that were classified as ferromagnets before Neel's discovery offerrimagnetism and antiferromagnetism.
www.therfcc.org /ferrimagnetism-113871.html   (139 words)

  
 Development of Artificial Y-Type Hexaferrites - Storming Media
These results imply that it is possible to orient the saturation magnetization in any direction within the plane of a device and the effective magnetization can be as high as 11800 Oe.
The microwave properties indicate that the ferrimagnetic resonance linewidth at 27 GHz is 350 Oe and the g-factor approximately equal to 2, see fig.1.
In fig.2 the vibrating sample magnetization (VSM) measurements for ZnMnY- type are shown for the external field applied parallel and perpendicular to easy plane of magnetization.
www.stormingmedia.us /32/3243/A324314.html   (307 words)

  
 Ferrimagnetism Encyclopedia Article, Definition, History, Biography   (Site not responding. Last check: 2007-10-07)
Looking For ferrimagnetism - Find ferrimagnetism and more at Lycos Search.
Find ferrimagnetism - Your relevant result is a click away!
Look for ferrimagnetism - Find ferrimagnetism at one of the best sites the Internet has to offer!
www.karr.net /encyclopedia/Ferrimagnetism   (325 words)

  
 McGraw-Hill AccessScience: Ferrimagnetism   (Site not responding. Last check: 2007-10-07)
A collection of all the magnetic sites in a crystal with identical behavior is referred to as a magnetic sublattice.
A material is said to exhibit ferrimagnetic order when, first, all moments on a given sublattice point in a single direction and, second, the resultant moments of the sublattices lie parallel or antiparallel to one another.
The notion of such an order is due to L. Néel, who showed in 1948 that its existence would explain many of the properties of the magnetic ferrites.
www.accessscience.com /Encyclopedia/2/25/Est_253900_frameset.html   (245 words)

  
 Ferrimagnetism
Non-English Usage: "Ferrimagnetism" is also a word in the following language with the English translation in parentheses.
Source: compiled by the editor, based on several corpora (additional references).
-3 letters: ferrimagnet, freemartins, garnierites, gentrifiers, reimmersing, remastering.
www.websters-online-dictionary.org /fe/ferrimagnetism.html   (410 words)

  
 ferrimagnetism --  Encyclopædia Britannica
The magnetic behaviour of single crystals of ferrimagnetic...
oxide materials that exhibit a certain type of permanent magnetization called ferrimagnetism.
In addition to tetrahedral and octahedral sites, such as those seen in spinels, garnets have dodecahedral (12-coordinated) sites.
www.britannica.com /eb/article?tocId=9034105   (367 words)

  
 Search Results for collinear ferrimagnetism - Encyclopædia Britannica
In ferrimagnets the moments are in an antiparallel alignment, but they do not cancel.
The best example of a ferrimagnetic mineral is magnetite...
Expand your search on collinear ferrimagnetism with these databases:
www.britannica.com /search?query=collinear+ferrimagnetism   (345 words)

  
 Louis Neel Winner of the 1970 Nobel Prize in Physics
Born: Nov 22 1904 - Nov 17, 2000
A CNRS research laboratory, headed by Louis Neel in the 70's (submitted by Anonymous)
fundamental work and discoveries concerning antiferromagnetism and ferrimagnetism which have led to important applications in solid state physics.
almaz.com /nobel/physics/1970b.html   (131 words)

  
 Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations   (Site not responding. Last check: 2007-10-07)
Energy Citations Database (ECD) Document #4086615 - FERRIMAGNETISM OF THE INTERMETALLIC COMPOUND Co$sub 2$Gd.
Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
GADOLINIUM ALLOYS AND SYSTEMS/Co--Gd, magnetic properties of Co$sub 2$Gd, ferrimagnetism in;COBALT ALLOYS AND SYSTEMS/Co--Gd, magnetic properties of Co$sub 2$Gd, ferrimagnetism in
www.osti.gov /energycitations/product.biblio.jsp?osti_id=4086615   (127 words)

  
 ferrimagnetism - StormingMedia
Your address will not be released to others.
Click on the titles below to find US government reports identified by the key word or phrase FERRIMAGNETISM
Development of Artificial Y-Type Hexaferrites Date: 01 MAY 2003
www.stormingmedia.us /keywords/ferrimagnetism.html   (124 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.