Abstract
Abstract
The unusual anisotropy of the spin glass (SG) transition in the pseudobrookite system Fe2TiO5 has been interpreted as arising from an induced, van der Waals-like, interaction among magnetic clusters. Here we present susceptibility (
χ
) and specific heat data (
C
) for Fe2TiO5 diluted with non-magnetic Ga, (Fe1−p
Ga
p
)2TiO5, for disorder parameter
p
= 0, 0.11, and 0.42, and elastic neutron scattering data for
p
= 0.20. A uniform suppression of
T
g
is observed upon increasing
p
, along with a value of
χ
T
g
that increases as
T
g
decreases, i.e.
d
χ
(
T
g
)
/
d
T
g
<
0
We also observe
C
T
∝
T
2
in the low temperature limit. The observed behavior places (Fe1−p
Ga
p
)2TiO5 in the category of a strongly geometrically frustrated SG.
Funder
the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division
Oak Ridge National Laboratory
NSF
U.S. Department of Energy
Subject
Condensed Matter Physics,General Materials Science