Investigation of Fe/Mo Ordering and Magnetic Properties of Ca{sub 2}Fe{sub x}Mo{sub 2−x}O{sub 6} (x = 0.9, 1.0, 1.1 and 1.2) Double Perovskites Prepared by Sonochemical Method

Journal Article · Fri Mar 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4738-0· OSTI ID:22919577

Markandeya, Y. ^[1]; Suresh, K. ^[2]; Bhikshamaiah, G. ^[3]

---

1. Osmania University, Department of Physics, Nizam College (India)
2. International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI) (India)
3. Osmania University, Department of Physics (India)

Characterization, Fe/Mo ordering and magnetic properties of Ca{sub 2}Fe{sub x}Mo{sub 2−x}O{sub 6} (x = 0.9, 1.0, 1.1 and 1.2) (CFMO) double perovskite have been studied. Sonochemical methodology is adopted to synthesize Ca{sub 2}Fe{sub x}Mo{sub 2−x}O{sub 6} double perovskite at low temperature (950 {sup ∘} C) under Ar/H{sub 2} atmosphere. Single-phase monoclinic structure by space group P2{sub 1}/n, lattice parameters (a, b and c) and unit cell volume (V ) have been confirmed from X-ray diffraction (XRD) patterns. Average grain sizes of 145 nm with a variation of porosity were observed from scanning electron microscopy (SEM) pictures. Elemental analysis using energy-dispersive X-ray spectroscopy (EDS) confirmed the presence of elements Ca, Fe, Mo and O with no trace of foreign elements, and the compound is found to be pure. Fourier transform infrared spectroscopy (FTIR) data confirmed perovskite formation by identifying three characteristic absorption bands in the wave number range 400–1000 cm{sup − 1} for Mo-O and Fe-O vibrations. Magnetic properties like M{sub s}, M{sub r} and H{sub c} were studied for CFMO series using vibrating sample magnetometer (VSM). Saturation magnetization is found to vary with Fe composition (x).

• OSTI ID: 22919577
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 3; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
CALCIUM COMPOUNDS
CONCENTRATION RATIO
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
IRON COMPOUNDS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
MOLYBDATES
MONOCLINIC LATTICES
PEROVSKITE
POROSITY
SCANNING ELECTRON MICROSCOPY
SPACE GROUPS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY