The physical significance of imaginary phonon modes in crystals

I Pallikara, P Kayastha, JM Skelton… - Electronic …, 2022 - iopscience.iop.org
The lattice vibrations (phonon modes) of crystals underpin a large number of material
properties. The harmonic phonon spectrum of a solid is the simplest description of its …

Novel features of multiferroic and magnetoelectric ferrites and chromites exhibiting magnetically driven ferroelectricity

R Saha, A Sundaresan, CNR Rao - Materials Horizons, 2014 - pubs.rsc.org
A few oxides such as YMnO3, TbMnO3, YMn2O5 and BiFeO3 constituted the small family of
well-characterized multiferroics until recently, but this area of research has been enlarged …

Multiferroic and magnetoelectric oxides: the emerging scenario

CNR Rao, A Sundaresan, R Saha - The journal of physical …, 2012 - ACS Publications
Multiferroics were considered to be rare because magnetism and ferroelectricity require
entirely different criteria for the materials. Several multiferroic oxides have, however, been …

Sol–Gel Synthesis and Micro-Raman Characterization of ε-Fe2O3 Micro- and Nanoparticles

J López-Sánchez, A Serrano, A Del Campo… - Chemistry of …, 2016 - ACS Publications
In this work, we present a sol–gel synthesis of ε-Fe2O3 nano and microparticles stabilized in
silica thin films. Thanks to the relatively high size of the synthesized particles, we have been …

Spin-phonon coupling in multiferroic RCrO3 (RY, Lu, Gd, Eu, Sm): a Raman study

VS Bhadram, B Rajeswaran, A Sundaresan… - Europhysics …, 2013 - iopscience.iop.org
Raman study on a select few orthochromites, RCrO 3 (R= Y, Lu, Gd, Eu and Sm), shows that
the phonon behavior at TN in compounds with magnetic R-ion (Gd and Sm) is remarkably …

Magnetically recoverable, non-toxic, leach resistant aluminum ferrite (AlFeO3) photocatalyst for wastewater remediation

S Bhuvanasundari, G Venkatachalam, M Doble… - Ceramics …, 2022 - Elsevier
The practical use of photocatalyst in wastewater treatment is mainly hindered due to the
recoverability of the catalyst. This can be addressed by the ferrite-based compounds which …

Multiferroic and magnetoelectric nature of GaFeO3, AlFeO3 and related oxides

R Saha, A Shireen, SN Shirodkar… - Solid State …, 2012 - Elsevier
GaFeO3, AlFeO3 and related oxides are ferrimagnetic exhibiting magnetodielectric effect.
There has been no evidence to date for ferroelectricity and hence multiferroicity in these …

Rapid preparation of AlFeO3/ZnO bulk heterojunctions through jet milling for photoelectrochemical water splitting

S Rath, S Bhuvanasundari, K Srikanti, DN Kar… - Ceramics …, 2024 - Elsevier
The investigation of photocatalytic behavior of compounds consisting of earth-abundant
elements is vital for discovering cheap photocatalysts/photoelectrocatalysts. AlFeO 3 is an …

Evidence of structural and two magnetic phase transitions in Cu doped La2FeMnO6 double perovskites

S Mohanty, R Sharma, SK Rout, S Mukherjee - Journal of Alloys and …, 2022 - Elsevier
In this report, we have addressed a comprehensive study on the structural phase transitions
with the help of a combination of high temperature x-ray diffraction and temperature …

Coupling of lattice, spin, and intraconfigurational excitations of in

B Singh, M Vogl, S Wurmehl, S Aswartham… - Physical Review …, 2020 - APS
In Eu 2 ZnIr O 6, effectively two atoms are active; ie, Ir is magnetically active, which results in
complex magnetic ordering within the Ir sublattice at low temperature. On the other hand …