Film strains enhance the reversible cycling of intercalation electrodes
We demonstrate how film straining of intercalation electrodes can circumvent its structural degradation upon repeated cycling.
A solution to the permalloy problem—A micromagnetic analysis with magnetostriction
We propose a solution to the longstanding “Permalloy problem”, i.e., why the particular composition of Fe21.5Ni78.5 achieves a dramatic drop in magnetic hysteresis.
A tool to predict coercivity in magnetic materials
We develop a novel coericity tool that for the fist time combines micromagnetics with magnetostriction and non-linear stability analysis.
Phase-field model for diffusion-induced grain boundary migration: An application to battery electrodes
We use our previously developed multiscale phase-field framework to model electrode microstructures not only as a function of Li composition, but also predict the crystallographic features of the underlying electrode during battery operation.
Order-disorder transition in nano-rutile TiO2 anodes: A high capacity low-volume change Li-ion battery material
Using ex situ and operando scattering techniques we elucidate the phase transformation in LixTiO2 during repeated charge-discharge processes.
Mechanical instability of electrode-electrolyte interfaces in solid-state batteries
We use the cohesive-energy approach to analyze the delamination criterion and derive a stability condition
for fracture propagation at electrode-electrolyte interfaces in solid-state batteries.
Periodic boundary conditions for the simulation of 3D domain patterns in tetragonal ferroelectric material
We identify the boundary conditions necessary to stabilize 3D domain patterns with long, ribbon-like domains threaded through them and with vortex-like features.
Combining phase-field crystal methods with a Cahn-Hilliard model for binary alloys
We introduce, for the first time, a theoretical framework that combines a Cahn-Hilliard and a phase-field crystal model to describe a phase transition process.
Nanoscale domain patterns and a concept for an energy harvester
We find that simple domain patterns with stripe-like features are stable across a wide range of externally imposed strains, and explore its application in a thin film energy harvester.
Nanoscale periodic domain patterns in tetragonal ferroelectrics: A phase-field study
We investigate the stability and evolution of periodic domain patterns in the form of multirank laminates in ferroelectrics. In contrast to previous findings using a linear, constrained theory, we find that these laminates are unstable at the nanoscale because of significant domain-wall energy.
MATERIALS DEPARTMENT
University of California, Santa Barbara
Santa Barbara, CA 93106-5050
