Abstract The synthesis of single‐crystalline β‐CsPbI 3 perovskite nanorods (NRs) using a colloidal process is reported, exhibiting their improved photostability under 45–55% humidity. crystal structure CsPbI NRs films investigated Rietveld refined X‐ray diffraction (XRD) patterns to determine crystallographic parameters and the phase transformation from orthorhombic (γ‐CsPbI ) tetragonal (β‐CsPbI on annealing at 150 °C. Atomic resolution transmission electron microscopy images are utilized...

Colloidal synthesized cubic α-CsPbI3 perovskite nanocrystals having a smaller lattice constant (a = 6.2315 Å) compared to the standard structure, and nanoscale mapping of their surfaces are reported achieve superior photovoltaic performance under 45–55% humidity conditions. Atomic scale transmission electron microscopic images have been utilized probe precise arrangement Cs, Pb, I atoms in unit cell NCs, which is well supported by VESTA structure. Theoretical calculation using density...

Abstract The structural dynamics involved in the mechanical flexibility of molecular crystals and internal stress such flexible materials remain obscure. Here, study reports an elastically bending lipidated crystal that shows systematic shifts characteristic vibrational frequencies across bent region – revealing nature changes during local distribution. blueshifts bond stretching modes (such as C═O C−H modes) inner arc redshifts outer observed via micro‐Raman mapping are counterintuitive to...

The structural dynamics involved in the mechanical flexibility of molecular crystals are not well understood yet. Here, we report an elastically bending lipidated crystal that shows systematic shifts characteristic vibrational frequencies across bent region - revealing nature changes during and local internal stress distribution. elastic is rendered by intermolecular N-H∙∙∙O hydrogen-bonded chains along with strong yet flexible alkyl-chain hydrophobic interactions this structure. blue bond...

We report a study of magnetization, resistivity, magnetoresistance, and specific heat the pyrochlore iridate ${({\mathrm{Eu}}_{1\ensuremath{-}x}{\mathrm{Nd}}_{x})}_{2}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ with $x=0.0$, 0.5 1.0, where spin-orbit coupling, electronic correlation, magnetic frustration, Kondo scattering coexist. The metal insulator transition temperature (${T}_{MI}$) decreases increase in Nd content, but always coincides irreversibility (field-induced moment). Resistivity below...

The high-pressure (HP) behavior of the tetragonal phase ${\mathrm{Y}}_{1.8}{\mathrm{Eu}}_{0.2}{\mathrm{Ge}}_{2}{\mathrm{O}}_{7}$ has been studied using x-ray diffraction, absorption spectroscopy, Raman, and photoluminescence spectroscopy techniques. Our studies show pressure-induced amorphization in accompanied by partial transformation to a crystalline above $\ensuremath{\sim}14.0$ GPa. Simultaneous high-pressure--high-temperature (HP-HT) experiments confirm pyrochlore structure phase....

Abstract The influence of martensite and austenite phase volume fractions on the magnetoresistance have been studied across first order transformation Ni 44 Cu 2 Mn 43 In 11 compound. different are calculated by measuring resistivity as a function temperature magnetic field. Our experiment reveals that field-induced fraction ( f IA ) at any depends availability instability M temperature. This is found to contribute most significantly observed large (MR), while contributions from parent...

In this report, we present a systematic study of magnetic behavior transition metal (TM = Fe or Cu) doped ZnO and co-doped (Cu, Fe) nanoparticles. All the samples show antiferromagnetic (AFM) like inverse susceptibility at low temperatures. all AFM Curie-Weiss temperature TAFM increases with increase in TM ion concentration indicating enhanced correlation upon doping. We observe crossover from state to ferromagnetic around (T) 100–150 K. shall try explain experimental observations by...

We have investigated the effect of Cu substitution in Eu2(Ir1-xCux)2O7 with help magnetic and transport property measurements. XPS measurement reveals that each Cu2+ converts Ir4+ to double amount Ir5+ ions. The metal-insulator transition temperature (T_MI) is obtained around 120 K. In insulating phase, at lower below 50 K, dependent resistivity follows a power law dependence magnitude exponent increases concentrations. thermopower observed follow electrical down except for sudden drop find...

We have studied the effect of nonmagnetic Ti substitution Eu2(Ir1-xTix)2O7 with help electrical transport and magnetic measurement. The minor structural modification enhances orbital overlapping favours its properties doping though tuning SOC U site dilution opposes it. As a result, metal insulator transition (MIT) is disappeared resistivity system throughout temperature increases doping. nature conduction mechanism at low follows power law like variation. Ti4+ nonmagnetic, introduction Ir...

Inverse Heusler alloy Cr2CoAl has been prepared by arc melting. XRD and Reitveld refinement study indicates XA lattice with B2 disorder. Magnetization measurement that this is ferrimagnetic below Tc=28K soft magnetic behavior as observed from M-H curve at 4K. We observe a deviation Curie-Weiss nature above Tc. also negative magnetization in certain temperature range only when measured very low fields zero field cooled (ZFC) condition. The not caused the trap magnetometer solenoid suggested...

Co2-xCr1+xAl for x=0 and 0.4 (x=0.4 means 20% of Co atoms Co2CrAl have been replaced by Cr atoms) prepared in tri-arc melting furnace. XRD pattern with Reitveld refinement analysis both samples indicate Heusler alloy like L21 structure B2 disorder. It is revealed Magnetization measurement that compounds show paramagnetic to ferromagnetic transition near 327K (for x=0) 302K x=0.4). Isothermal field dependent magnetization loop at 4K suggests soft magnetic behavior saturation moment values...

Heusler compound (Co1-xCrx)2CrAl for x=0 and 0.2 have been prepared by arc melting process. Room temperature XRD patterns of both compounds indicate single phase Cu2MnAl like L21 structure with B2 disorder. Resistivity measurement varying from 8-300K indicates metal behavior all compounds. At high (above 150K) resistivity linearly increases increasing temperature. low region (≈8-40K) nonlinearity is observed in vs. plot because unconventional one-magnon scattering two-magnon that...

We have studied the phase volume fraction related magnetoresistance (MR) across first order martensite transformation (MT) of Ni44Cu2Mn43In11 alloy. Within metastability MT, an isothermal application magnetic field converts into austenite. The induced austenite (fIA) at any temperature depends on availability and instability (fM ) that temperature. This fIA is found to contribute most significantly observed giant MR while contribution from pure negligible. It net follows a non linear...