Field-induced magnetostructural transition in Gd5Ge4 studied by pulsed magnetic fields

TitleField-induced magnetostructural transition in Gd5Ge4 studied by pulsed magnetic fields
Publication TypeJournal Article
Year of Publication2008
AuthorsOuyang ZW, Nojiri H, Yoshii S, Rao GH, Wang YC, Pecharsky VK, Gschneidner KA
Journal TitlePhysical Review B
Volume77
Pages184426
Date PublishedMay
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000256885300074
Keywordsalloys, gd-5(si2ge2), gd-5(sixge1-x)(4), phase-transition
Abstract

The field-induced magnetostructural transformation in Gd5Ge4 was examined by magnetization measurements in pulsed magnetic fields. The low-temperature irreversibility of the transition can be destroyed by the magnetocaloric effect, and depending on the heat exchange between the sample and its surroundings, the irreversibility (or kinetic arrest) can also be retained. Measurements by using various magnetic-field sweep rates were conducted to examine the dynamic response of the system in the transition region. The critical fields for the magnetostructural transition below 20 K are field sweep rate dependent-the larger the field sweep rate, the higher the critical field. However, this rate dependence is readily suppressed with increasing temperature.

DOI10.1103/PhysRevB.77.184426
Alternate JournalPhys. Rev. B