Magnetic structure and transport properties of
Ba2FeWO6 synthesized in ambient H2: Ar gas
Jasnamol P P*, Neenu Lekshmi P, Manoj Raama Varma
CSIR-National Institute for Interdisciplinary Science and technology, Trivandrum, India
*
jasnayasbe@gmail.com, Tel.: +91-471-2515377
Abstract
Synthesized Ba2FeWO6 with cubic crystal structure in
ambient H2: Ar gas. Magnetic structure is to be accredited
with characterization using magnetic susceptibility as a
function of temperature and applied magnetic field.
Transport properties of Ba2FeWO6 will also be presented.
account of the recent focus on spintronics application of
double perovskite materials.
Keywords: A2BB’O6, Double-perovskite, Magnetic structure,
Spintronics, Transport properties.
Introduction
The discovery of the large room temperature
magnetoresistance in double-perovskite Sr2FeMoO6
with Tc around 420K [1] has entertained researcher’s
focus on double perovskite materials A2BB’O6 with A
being alkaline earth metal or rare earth element, B and
B’ being transition metals. In 1959, E. J. Fresia et al.
synthesized Ba2FeWO6 (BFWO) and identified cubic
crystal structure [2]. Later in 2002, A. K. Azad et al.
reported BFWO with tetragonal I4/m crystal structure
[3] and an antiferromagnetic ordering below 30K [4]. In
2004, N. Rammeh et al. reported the BFWO having
cubic
Fm-3m
crystal
structure
[5]
with
antiferromagnetic ordering.
The present study investigates the magnetic
structure and the transport properties of BFWO
synthesized with ambient H2: Ar mixture gas, where the
up to day results on this topic are all on materials
synthesized in air atmosphere [1-4] or in evacuated
silica tube [5].
High purity BaCO3, Fe2O3 and WO3 are used
as the starting materials to synthesize BFWO through
standard solid state reaction route. The pre-calcinated
powders are sintered with 9% H2: Ar gas as surrounding
atmosphere. The X ray diffraction pattern is obtained
and is identical to cubic Fm-3m structure, same as that
reported by N. Rammeh et al. [5], synthesized in
evacuated silica tube.
The magnetic structure of the as synthesized
BFWO will be identified by Susceptibility vs.
temperature and Magnetization vs. applied magnetic
field plot. The transport properties are also studied on
Fig. 1: XRD pattern of Ba2FeWO6
Acknowledgment
The authors acknowledge Department of
Science and Technology, University Grand Commission
and Council of Scientific and Industrial Research, Gov.
of India for funding and fellowship.
References
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(1988), pp. 677-680.
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