Hyperfine interactions in dilute Se doped Fe x Sb 1 − x bulk alloy

• Published in: Hyperfine interactions Vol. 237; no. 1; pp. 1 - 7
• Main Authors: Sarkar, Mitesh, Agrawal, Naveen, Chawda, Mukesh
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01-12-2016
• Subjects: Amorphous alloys; Depolarization; Dilution; Fourier transforms; Infrared spectroscopy; Iron; Magnetic moments; Mossbauer spectroscopy; Quadrupoles; Spectrum analysis
• ISSN: 0304-3843; 1572-9540
• DOI: 10.1007/s10751-016-1249-x

Hyperfine Interaction technique like Mossbauer spectroscopy is a very sensitive tool to study the local probe interactions in Iron doped alloys and compounds. We report here the Mossbauer study of the effect of Fe concentration variations in dilute magnetic semiconducting Se0.004FexSb1−x alloys for x = 0.002, 0.004 and 0.008. The materials were characterized using X-ray diffraction technique (XRD), Fourier Transform Infra-red spectroscopy (FTIR), Neutron depolarization and Mossbauer spectroscopy. The FTIR result shows the semiconducting behavior of the alloys with band gap of 0.18 eV. From Mossbauer spectroscopy two magnetic sites (A and B) were observed. The value of hyperfine magnetic fields (HMF) of ∼ 308 kOe (site A) and 270 kOe (site B) was constant with increase in Fe concentration. A nonmagnetic interaction was also observed with quadrupole splitting (QS) of 1.26 mm/sec (site C) for x = 0.004 and x = 0.008. The Neutron depolarization studies indicate that the clusters of Fe or Fe based compounds having net magnetic moments with a size greater than 100 Å is absent.