Evidence of spin phonon coupling in magnetoelectric NiFe{sub 2}O{sub 4}/PMN-PT composite

Journal Article · Mon Dec 16 04:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4850555· OSTI ID:22253752

Ahlawat, Anju; Gupta, P. K. ^[1]; Sathe, V. G.; Choudhary, R. J. ^[2]

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1. Nano Functional Materials Laboratory, Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)
2. UGC-DAE Consortium for Scientific Research, Indore 452017 (India)

The coupling of phonon with spin in strain coupled magnetoelectric NiFe{sub 2}O{sub 4} (NFO)/0.65Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–0.35PbTiO{sub 3} (PMN-PT) composite was investigated by temperature-dependent Raman spectroscopy and magnetic measurements in the range 30–350 °C. Pure NFO shows usual ferromagnetic behaviour in this temperature range while NFO/PMN-PT composite show dramatic change in magnetic moment across ferroelectric transition temperature (T{sub c} ∼ 180 °C) of PMN-PT. The temperature evolution of the Raman spectra for the composite shows significant phonon anomalies in T-site (Fe-O) and O-site (Ni/Fe-O) phonon modes at ferroelectric transition temperature is attributed to spin phonon coupling in NFO/PMN-PT composite. The strain mediated magnetoelectric coupling mechanism in this composite is apparent from the observed spin phonon interaction.

• OSTI ID: 22253752
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 103; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
PHONONS
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SPIN
STRAINS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE