IDEAS home Printed from https://ideas.repec.org/a/eee/phsmap/v261y1998i1p135-142.html
   My bibliography  Save this article

Magnon contribution to the specific heat and the validity of power laws in antiferromagnetic crystals

Author

Listed:
  • Joshua, S.J.

Abstract

For any crystal, the specific heat due to phonons can be written as Cph=AT3 where A is a constant and for a metal, the conduction electrons contribute a term that can be written as Cel(T)=γT. At low temperatures, however, other contributions to the specific heat may become significant. What is measured experimentally at any temperature T is the total specific heat Ctot of the solid. To separate the various contributions to Ctot, it is customary to make use of the known power-law variations of the various contributions. In the case of antiferromagnetic materials, if one uses the theory of spin-waves based on the Heisenberg Hamiltonian, one obtains a magnon contribution CM(T) to Ctot, which is of the form CM(T)=BTn, where n=3 for a 3-D (spatial) antiferromagnet, n=2 for a 2-D (layer) antiferromagnet and n=1 for 1-D (linear) antiferromagnet. The paper presents the results of calculations of CM(T) is some linear, planar and spatial antiferromagnets with a view to investigating, inter-alia, the validity of the power laws in these materials.

Suggested Citation

  • Joshua, S.J., 1998. "Magnon contribution to the specific heat and the validity of power laws in antiferromagnetic crystals," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 261(1), pages 135-142.
    • Handle: RePEc:eee:phsmap:v:261:y:1998:i:1:p:135-142
    DOI: 10.1016/S0378-4371(98)00370-7
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0378437198003707
    Download Restriction: Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000
    File URL: https://libkey.io/10.1016/S0378-4371(98)00370-7?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:phsmap:v:261:y:1998:i:1:p:135-142. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/physica-a-statistical-mechpplications/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.