Crystallography, anisotropic metamagnetism, and magnetocaloric effect in Tb5Si2.2Ge1.8

TitleCrystallography, anisotropic metamagnetism, and magnetocaloric effect in Tb5Si2.2Ge1.8
Publication TypeJournal Article
Year of Publication2007
AuthorsZou M, Mudryk Y, Pecharsky VK, Gschneidner KA, Schlagel DL, Lograsso TA
Journal TitlePhysical Review B
Volume75
Pages024418
Date PublishedJan
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000243895100068
Keywordslu, MAGNETIC REFRIGERATION, PARAMAGNETIC PHASE, SINGLE-CRYSTAL, TRANSITIONS
Abstract

The metamagnetic-like transitions and giant magnetocaloric effect were observed with the magnetic field applied parallel to the a and c axes, but not the b axis in a Tb5Si2.2Ge1.8 single crystal. The in situ x-ray powder diffraction study indicates that these metamagnetic-like transitions are coupled to crystallographic phase transformations occurring via strong magnetoelastic interactions. The magnetocrystalline anisotropy plays an important role in this system. Magnetic fields less than 40 kOe cannot drive either the magnetic or the crystallographic phase transition to completion for Tb5Si2.2Ge1.8 powder due to the strong single ion anisotropy of Tb.

DOI10.1103/PhysRevB.75.024418
Alternate JournalPhys. Rev. B