Spin-glass behavior in a giant unit cell compound Tb117Fe52Ge113.8(1)

Spin-glass behavior in a giant unit cell compound Tb117Fe52Ge113.8(1)

In this paper we demonstrate evidence of a cluster spin glass in Tb117Fe52Ge113.8(1) (a compound with a giant cubic unit cell) via ac and dc magnetic susceptibility, magnetization, magnetic relaxation and heat capacity measurements. The results clearly show that Tb117Fe52Ge113.8(1) undergoes a spin...

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Veröffentlicht in:Journal of physics. Condensed matter 2014-10, Vol.26 (41), p.416003-416003
Hauptverfasser: Liu, J, Xie, W, Gschneidner, K A, Miller, G J, Pecharsky, V K
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giant unit cell
MATERIALS SCIENCE
rare earth intermetallics
spin glass
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container_end_page 416003
container_issue 41
container_start_page 416003
container_title Journal of physics. Condensed matter
container_volume 26
creator Liu, J
Xie, W
Gschneidner, K A
Miller, G J
Pecharsky, V K
description In this paper we demonstrate evidence of a cluster spin glass in Tb117Fe52Ge113.8(1) (a compound with a giant cubic unit cell) via ac and dc magnetic susceptibility, magnetization, magnetic relaxation and heat capacity measurements. The results clearly show that Tb117Fe52Ge113.8(1) undergoes a spin glass phase transition at the freezing temperature, ~38 K. The good fit of the frequency dependence of the freezing temperature to the critical slowing down model and Vogel-Fulcher law strongly suggest the formation of cluster glass in the Tb117Fe52Ge113.8(1) system. The heat capacity data exhibit no evidence for long-range magnetic order, and yield a large value of Sommerfeld coefficient. The spin glass behavior of Tb117Fe52Ge113.8(1) may be understood by assuming the presence of competing interactions among multiple non-equivalent Tb sites present in the highly complex unit cell.
doi_str_mv 10.1088/0953-8984/26/41/416003
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MATERIALS SCIENCE
rare earth intermetallics
spin glass
title Spin-glass behavior in a giant unit cell compound Tb117Fe52Ge113.8(1)
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