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26th National Symposium on Cryogenics and Superconductivity

22-24 February 2017
VECC
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Low temperature magnetic properties of ferrimagnetic and ferroelectric composites
 
Content: Multiferroic exhibit interplay between electric, magnetic and elastic behaviour of the material as a function of composition. The multiferroic composites were synthesized using the nanoparticles of Mn-Zn ferrite (MZF) and BaTiO3 (BTO) with different composition ratio by sintering at 1200°C for 6 hours. The X-ray diffraction and field emission surface electron micrographs confirm the coexistence of ferrimagnetic (FM) and ferroelectric phases (FE). The magnetization plots (M(H)) of the composites at 5 K show high coercivity of ~ 800G compared to the value of ~ 10G for MZF. The magnetization decreases with the inclusion of diamagnetic BTO in MZF. The variation of magnetization at 5 and 300 K is related to the variation in grain size of FE inclusions in the composites. The temperature dependent magnetization (M(T)) plots were recorded from 5 to 350 K in zero field cooled and field cooled modes. The M(T) plot of MZF shows long range ferrimagnetic order whereas for composites it shows short-range magnetic order. The significant change in M(T) values are observed with the inclusion of FE ions in FM ordered system. The dielectric constant and loss values of FM-FE composites decrease with increase in frequency and approaches a low saturation value at high frequencies.
Summary: The X-ray diffraction and field emission surface electron micrographs confirm the coexistence of ferrimagnetic and ferroelectric phases (FE).The magnetic data shows the effect of ferroelectric phase inclusion in ferrimagnetic phase.
Id: 78
Place: VECC 
1/AF, Bidhan Nagar Kolkata - 700008

Room: Meghnad Saha Auditorium, SINP-VECC Campus
Starting date:
--not yet scheduled--   
Duration: 00'
Primary Authors: Ms. FARHEEN, Atiya (School of Physics, University of Hyderabad)
Co-Authors: SINGH, Rajender (School of Physics, University of Hyderabad)
Presenters: Ms. FARHEEN, Atiya
SINGH, Rajender
 
Included in session: Poster Session 2: Abstract ID 11,33,34,35,36,38,39,40,43,48,52,54,59,66, 67,70,71,78,88,89,90,92,94,100,102,105,107,108, 109,111,112,115,116, 120,121,124,125,127,128,129,131,190
Included in track: Superconducting Materials / Low Temperature Physics