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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Signature of a Griffiths phase in layered canted antiferromagnet Sr2IrO4
Journal of Magnetism and Magnetic Materials, Volume 468, Year 2018
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Description
The complex magnetic nature of 5d layered iridate Sr2IrO4, owing to IrO6 octahedral rotation has triggered great interest in recent years. In this article, we investigated the magnetic excitations in layered canted antiferromagnet Sr2IrO4 via dc magnetization measurements and report the Griffiths phase (GP) signatures above the magnetic ordering temperature TN. The non-analytic nature of GP leads to unique critical exponent, β = 0.75(1) extracted from modified Arrott plot, in corroboration with magneto-caloric study. However, the analysis by Bray model in GP regime yields a reliable critical exponent value of β = 0.18(1), belonging to two-dimensional XYh4 universality class. The study also suggests a new picture of largely debated insulating nature of Sr2IrO4 in context of GP above TN. © 2018
Authors & Co-Authors
Singh, Ravi Prakash
India, Bhopal
Indian Institute of Science Education and Research Bhopal
Babu, P. D.
India, Mumbai
Government of India, Department of Atomic Energy
Gupta, Anurag K.
India, New Delhi
Council of Scientific and Industrial Research India
India, Ghaziabad
Academy of Scientific and Innovative Research Acsir
Statistics
Citations: 13
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1016/j.jmmm.2018.07.091
ISSN:
03048853