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Is ferromagnetism a special case of paramagnetism as implied in para 3?-- Light current 22:04, 19 September 2005 (UTC)....
Even ferro,ferrimagnetic materials align with an external magnetic field (if it means spontaneous magnetisation in ferromagnetism then the situation is different).
Paramagnetic materials attract and repel like normal magnets when subject to a magnetic field-Wrong statement without proper explanation. Justin
This definition is acceptable from the external link given
The Langevin model, which is true for materials with non-interacting localised electrons, states that each atom has a magnetic moment which is randomly oriented as a result of thermal agitation. The application of a magnetic field creates a slight alignment of these moments and hence a low magnetisation in the same direction as the applied field.
Is the list meant to be exhaustive? It doesn't include Titanium, but according to that article it should. -- 87.82.29.198 19:20, 18 June 2006 (UTC)
How about irradiated crystals and radicals? Example: Irradiated solid alanine, both singel crystals and powder gives an electron paramagnetic resonance (EPR) signal. The organic radical DPPH is used as an EPR reference.
Should they not be included in the list of paramagnetic materials? ( Hakgu 15:32, 29 May 2007 (UTC))
Frankly, this is a poor contribution as it stands. Except for oxygen, none of the materials listed exhibit Curie-Law behavior - "iron oxide" (the composition is ambiguous!) is magnetically ordered, and all the metals listed act act like typical paramagnets under no circumstances at all! No expert in magnetism would have selected lithium, sodium, or aluminum as examples of typical "paramagnets" at all. These metals exhibit weak, temperature-independent, Pauli paramagnetism, with room temperature magnetizations that are orders of magnitude smaller even than liquid oxygen. (Anyone ever see aluminum suspended between the pole faces of a small lab magnet?) When I find the time, I'll try to do an extensive rewrite. —Preceding unsigned comment added by Gadolinist ( talk • contribs) 14:34, 21 June 2009 (UTC)
Spin glass and mictomagnets are not a type of paramagnet 132.234.251.211 06:21, 7 August 2006 (UTC)
Is this a phrase: "Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability greater than unity (or, equivalently, a positive magnetic susceptibility)." Unity what who where? :)
and this word: exchanergy what's that? Is that a misspell? :)
A few examples are listed as being diamagnetic or ferromagnetic as well. Is that possible? Cmcnicoll 22:57, 12 June 2007 (UTC)
The abstract of this article states "...paramagnets do not retain any magnetization in the absence of an externally applied magnetic field."
The introduction seems to contradict that directly, in that it states "...paramagnetic materials have permanent magnetic moments (dipoles), even in the absence of an applied field."
My understanding is that the introduction is incorrect and should be changed to read "paramagnetic materials do not have permanent magnetic moments (dipoles) in the absence of an applied field."
Pazfrater 23:19, 11 August 2007 (UTC)
I think it is rather confusing that there is no difference made between localized and itinerant forms of paramagnetism. Many metals are not really paramagnetic in the sense of molecular oxygen because their electrons are delocalized in a band.
Jcwf ( talk) 21:44, 27 December 2007 (UTC)
My question is: does the paramagnetism of oxygen, in the presence of the Earth's magnetic field affect the distribution of oxygen around the Earth. Also, aside, do colder temperatures at the south pole affect the amount of O3 in the atmosphere during the southern hemisphere winter? Cvgittings ( talk) 00:59, 14 June 2008 (UTC)
Curious on the answer of this question too. Also the earth's magnetism / gravity is it the same thing? Should it affect thus align unpaired electron too, or is it too weak? But strong enough to retain atmosphere and keep stuff on earth's surface? YogiHalim ( talk) 22:12, 20 July 2019 (UTC)
Perhaps a stronger connection should be made to MO theory? The 'Relation to electric spins' section contains the following:
The permanent moment generally is due to the spin of unpaired electrons in atomic or molecular electron orbitals (see Magnetic moment)
This could be misinterpreted by those unfamiliar with molecular orbitals:
I added links to Atomic orbital and Molecular orbital. If anyone else was confused by this, perhaps we should do more? -- Quantum 7 23:54, 19 March 2012 (UTC)
"so all atoms with incompletely filled atomic orbitals are paramagnetic"
this is not true, examples are Radon, Astatine, Radium, etc. — Preceding unsigned comment added by Chrimas1 ( talk • contribs) 11:23, 8 February 2018 (UTC)
This
level-5 vital article is rated B-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||
|
Is ferromagnetism a special case of paramagnetism as implied in para 3?-- Light current 22:04, 19 September 2005 (UTC)....
Even ferro,ferrimagnetic materials align with an external magnetic field (if it means spontaneous magnetisation in ferromagnetism then the situation is different).
Paramagnetic materials attract and repel like normal magnets when subject to a magnetic field-Wrong statement without proper explanation. Justin
This definition is acceptable from the external link given
The Langevin model, which is true for materials with non-interacting localised electrons, states that each atom has a magnetic moment which is randomly oriented as a result of thermal agitation. The application of a magnetic field creates a slight alignment of these moments and hence a low magnetisation in the same direction as the applied field.
Is the list meant to be exhaustive? It doesn't include Titanium, but according to that article it should. -- 87.82.29.198 19:20, 18 June 2006 (UTC)
How about irradiated crystals and radicals? Example: Irradiated solid alanine, both singel crystals and powder gives an electron paramagnetic resonance (EPR) signal. The organic radical DPPH is used as an EPR reference.
Should they not be included in the list of paramagnetic materials? ( Hakgu 15:32, 29 May 2007 (UTC))
Frankly, this is a poor contribution as it stands. Except for oxygen, none of the materials listed exhibit Curie-Law behavior - "iron oxide" (the composition is ambiguous!) is magnetically ordered, and all the metals listed act act like typical paramagnets under no circumstances at all! No expert in magnetism would have selected lithium, sodium, or aluminum as examples of typical "paramagnets" at all. These metals exhibit weak, temperature-independent, Pauli paramagnetism, with room temperature magnetizations that are orders of magnitude smaller even than liquid oxygen. (Anyone ever see aluminum suspended between the pole faces of a small lab magnet?) When I find the time, I'll try to do an extensive rewrite. —Preceding unsigned comment added by Gadolinist ( talk • contribs) 14:34, 21 June 2009 (UTC)
Spin glass and mictomagnets are not a type of paramagnet 132.234.251.211 06:21, 7 August 2006 (UTC)
Is this a phrase: "Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability greater than unity (or, equivalently, a positive magnetic susceptibility)." Unity what who where? :)
and this word: exchanergy what's that? Is that a misspell? :)
A few examples are listed as being diamagnetic or ferromagnetic as well. Is that possible? Cmcnicoll 22:57, 12 June 2007 (UTC)
The abstract of this article states "...paramagnets do not retain any magnetization in the absence of an externally applied magnetic field."
The introduction seems to contradict that directly, in that it states "...paramagnetic materials have permanent magnetic moments (dipoles), even in the absence of an applied field."
My understanding is that the introduction is incorrect and should be changed to read "paramagnetic materials do not have permanent magnetic moments (dipoles) in the absence of an applied field."
Pazfrater 23:19, 11 August 2007 (UTC)
I think it is rather confusing that there is no difference made between localized and itinerant forms of paramagnetism. Many metals are not really paramagnetic in the sense of molecular oxygen because their electrons are delocalized in a band.
Jcwf ( talk) 21:44, 27 December 2007 (UTC)
My question is: does the paramagnetism of oxygen, in the presence of the Earth's magnetic field affect the distribution of oxygen around the Earth. Also, aside, do colder temperatures at the south pole affect the amount of O3 in the atmosphere during the southern hemisphere winter? Cvgittings ( talk) 00:59, 14 June 2008 (UTC)
Curious on the answer of this question too. Also the earth's magnetism / gravity is it the same thing? Should it affect thus align unpaired electron too, or is it too weak? But strong enough to retain atmosphere and keep stuff on earth's surface? YogiHalim ( talk) 22:12, 20 July 2019 (UTC)
Perhaps a stronger connection should be made to MO theory? The 'Relation to electric spins' section contains the following:
The permanent moment generally is due to the spin of unpaired electrons in atomic or molecular electron orbitals (see Magnetic moment)
This could be misinterpreted by those unfamiliar with molecular orbitals:
I added links to Atomic orbital and Molecular orbital. If anyone else was confused by this, perhaps we should do more? -- Quantum 7 23:54, 19 March 2012 (UTC)
"so all atoms with incompletely filled atomic orbitals are paramagnetic"
this is not true, examples are Radon, Astatine, Radium, etc. — Preceding unsigned comment added by Chrimas1 ( talk • contribs) 11:23, 8 February 2018 (UTC)