K
Kumar Brajesh
Researcher at Indian Institute of Science
Publications - 32
Citations - 460
Kumar Brajesh is an academic researcher from Indian Institute of Science. The author has contributed to research in topics: Tetragonal crystal system & Dielectric. The author has an hindex of 8, co-authored 30 publications receiving 368 citations. Previous affiliations of Kumar Brajesh include Veer Kunwar Singh University.
Papers
More filters
Journal ArticleDOI
Orthorhombic-tetragonal phase coexistence and enhanced piezo-response at room temperature in Zr, Sn, and Hf modified BaTiO3
TL;DR: The effect of Zr, Hf, and Sn in BaTiO3 has been investigated at close composition intervals in the dilute concentration limit in this paper, and the results show substantial enhancement in the longitudinal piezoelectric coefficient (d(33)).
Journal ArticleDOI
Relaxor ferroelectricity and electric-field-driven structural transformation in the giant lead-free piezoelectric (Ba,Ca)(Ti, Zr)O-3
TL;DR: Liu et al. as discussed by the authors analyzed the nature of crystallographic phase coexistence at room temperature, and temperature and field-induced phase transformation to throw light on the atomistic mechanisms associated with the large piezoelectric response of lead-free (Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3 (15/10BCTZ).
Journal ArticleDOI
Structural transformations in morphotropic-phase-boundary composition of the lead-free piezoelectric system Ba (T i 0.8 Z r 0.2 ) O 3 -(B a 0.7 C a 0.3 ) Ti O 3
TL;DR: In this paper, a detailed investigation of the structural phase transformation behavior of the morphotropic phase boundary (MPB) composition of the lead-free piezoelectric system (1 - x) Ba(Ti0.8Zr0.2)O-3 - x(Ba0.7Ca0.3) TiO3 has attracted great attention.
Journal ArticleDOI
Ferroelectric instabilities and enhanced piezoelectric response in Ce modified BaTiO3 lead-free ceramics
TL;DR: In this paper, the crystal structure, ferroelectric, and piezoelectric behaviors of the Ba(Ti1−xCex)O3 solid solution have been investigated at close composition intervals in the dilute concentration regime.
Journal ArticleDOI
Structural perspective on the anomalous weak-field piezoelectric response at the polymorphic phase boundaries of (Ba ,Ca ) (Ti ,M ) O 3 lead-free piezoelectrics (M =Zr , Sn, Hf)
TL;DR: In this paper, a comparative structural, ferroelectric, and piezoelectric analysis of the Ca-modified mm2$ phase in the immediate vicinity of the orthorhombic ($Amm2$)-tetragonal ($P4mm$) phase boundaries was carried out.