Crystal Growth Simulation of BMO Nanorods in BMO-Doped REBCO Films With Seed layers

Abstract

The self-organization of BaMO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (BMO) nanorods in REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> films is important for enhancing the superconducting properties in magnetic fields. We previously reported the control of BMO self-organization using the seed layer technique, which included the low-temperature growth (LTG) technique. The LTG technique can achieve a high number density of BMO nanorods and excellent critical current density in magnetic fields at 4.2 K. To clarify the self-organization mechanism of BMO nanorods, we develop a three-dimensional Monte Carlo simulation and investigate the effect of the seed layer technique on the growth of BMO nanorods. Results show that the number density of BMO nanorods is affected by the seed layer deposited at a low deposition rate (v <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">DR</sub> ) and/or high substrate temperature (T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s</sub> ). Moreover, we propose a growth kinetic factor (R) that includes v <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">DR</sub> , T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s</sub> , and BMO volume fraction. Our simulation results of the number density are affected by R; therefore, Ris useful for predicting the number density of BMO nanorods.