Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4800442
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We have investigated the phonon spectra of pulsed laser deposited Sr2CoO4 thin film and its evolution with temperature using Raman spectroscopy. The magnetic measurement reveals magnetic transition at temperature T-C = 255K. No structural phase transition is observed in the investigated temperature range (100-300 K). Close correlation between the frequency shift and the magnetization across T-C establishes that the anomaly in the vicinity of T-C is owing to spin-phonon coupling in the material. Using two different approaches, we have calculated spin-phonon coupling strength to be in the range of 2-3.5 cm(-1). (C) 2013 American Institute of Physics.
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