Gd3Fe5O12 near the compensation temperature

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

Abstract

Applying a magnetic eld to a magnetic material will usually cause a change in the magnetic entropy of the material. If done adiabatically, the temperature of the material will change - this is the magnetocaloric eect. Gadolinium Iron Garnet (GdIG, Gd3Fe5O12) is a complex magnetic system with three magnetic sublattices, one Gd and two Fe. The Fe sites are strongly coupled antiferromagnetically, i.e. the magnetic moments are anti-parallel, while the Gd magnetic moment is weakly coupled antiferromagnetically to the resulting Fe moment. This results in a compensation temperature, where the total magnetic moment is zero, while the material is still in the magnetic phase and, for applied magnetic elds up to mu0H=1.6 T, the magnetic entropy change is also zero. On my poster I will present the results I have obtained on a sample of GdIG.
Original languageEnglish
Title of host publicationProgram and abstracts
PublisherDanish Physical Society
Publication date2010
Pages63-63
Publication statusPublished - 2010
EventDanish Physical Society Annual Meeting 2010 - Nyborg, Denmark
Duration: 22 Jun 201023 Jun 2010

Conference

ConferenceDanish Physical Society Annual Meeting 2010
CountryDenmark
CityNyborg
Period22/06/201023/06/2010

Keywords

  • Magnetic refrigeration
  • Fuel Cells and hydrogen

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