Talk:Paramagnetism

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[edit] Unity

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? :)

agreed. "greater than unity" is a confusing way of putting it. i have changed it to "greater than 1" --Someones life 04:30, 1 April 2007 (UTC)

and this word: exchanergy what's that? Is that a misspell? :)

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.

[edit] Materials

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))

[edit] Spin glass and mictomagnets

Spin glass and mictomagnets are not a type of paramagnet 132.234.251.211 06:21, 7 August 2006 (UTC)

[edit] Paramagnetic examples

A few examples are listed as being diamagnetic or ferromagnetic as well. Is that possible? Cmcnicoll 22:57, 12 June 2007 (UTC)

[edit] Abstract/Introduction

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)

No, it is correct as written. Even without an external field, a paramagnet has microscopic magnetic moments. However, without an applied field, these microscopic moments are not aligned and the overall magnetization (a macroscopic average quantity) is zero. —Steven G. Johnson 03:09, 12 August 2007 (UTC)

[edit] Pauli-paramagnetism

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)

[edit] Oxygen paramagnetism affect on distribution on Earth

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)