Tailoring the Band gap and magnetic properties by Bismuth substitution in Neodymium Chromite

Mannepalli, Venkateswara Rao and M M, Saj Mohan and Ramadurai, Ranjit (2017) Tailoring the Band gap and magnetic properties by Bismuth substitution in Neodymium Chromite. Bulletin of Materials Science. pp. 1-24. ISSN 0250-4707 (In Press)

BOMS-D-16-01767.pdf - Accepted Version

Download (1MB) | Preview


The intrinsic distortions present in r are earth ortho chromites (RCrO 3 ) observed from lanthanum to lutetium (in R - site) can influence the magnetic properties like Neel Transition and weak ferromagnetic coupling . A n on - magnetic cation with similar ionic radius would be a suitable candidate to engineer the inherent distortions of particular orthochromite. In this study Bismuth (Bi 3+ ) with a 6s 2 lone pair was chosen to substitute in Neodymium (Nd 3+ ) site of NdCrO 3 (NCO) to tailor the int rinsic structural distortions. Th e variation of optical absorption edge evidently suggests that Bi ( 6 s 2 ) substituted in the m agnetic rare earth Nd +3 influences the Cr - O overlap integral. Th e interaction of Bi cation with oxygen bonds influences the structural distortions through Cr - O polyhedra which are evident from Raman scattering studies . The observed structural and magnetic properties of similar ionic radius of Bi 3+ in Nd 3+ reveals that intrinsic structural distortions are interrelated to enhanced weak ferromagnetic component and change in Neel and spin reorientation temperatures in our compou nds . In addition a reduction in the optical band gap of NCO from 3.1 eV to 2. 6 eV w as observed.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Ramadurai, Ranjithttp://orcid.org/0000-0003-2991-0027
Item Type: Article
Uncontrolled Keywords: Raman Spectroscopy, Magnetic Properties and Optical Band gap
Subjects: Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 20 Sep 2017 06:54
Last Modified: 20 Sep 2017 06:54
URI: http://raiith.iith.ac.in/id/eprint/3563
Publisher URL:
OA policy: http://www.sherpa.ac.uk/romeo/issn/0250-4707/
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 3563 Statistics for this ePrint Item