Abstract
The pseudoperovskite BiMnO3 is a multiferroic candidate, but missing details of materials properties are impeding potential technological applications. BiMnO3 has a centrosymmetric structure that precludes ferroelectricity in bulk stoichiometric samples, while some films have reported ferroelectricity along with a decreased magnetic response. This puzzle motivated a study of one such film, deposited by pulsed laser deposition onto SrTiO3. Probes utilized include microscopy, diffraction, reflectometry, and X-ray absorption. These experiments in the context of the existing literature show an anomalous unit-cell volume and a (magnetic) depth profile. Then, the resulting inhomogeneous deficiency of Bi and Mn metals may stabilize a multiphase system that explains the decreased magnetism. Film nanostructure and strain effects are also considered.
| Original language | English |
|---|---|
| Article number | 5111115 |
| Journal | Journal of Applied Physics |
| Volume | 126 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 28 2019 |
Funding
Use of the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (under Contract No. DE-AC02-98CH10886). Support for Lisa A. Krayer was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement No. DMR-1508249. The research was performed in part at the NIST Center for Nanoscale Science and Technology. This research used resources of the Compute and Data Environment for Science (CADES) at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725 Daniel M. Pajerowski is supported through the Scientific User Facilities Division of the Department of Energy (DOE) Office of Science, sponsored by the Basic Energy Science (BES) Program, DOE Office of Science. Daniel M. Pajerowski acknowledges support from the National Research Council (NRC)/National Institute of Standards and Technology (NIST) Research Associateship Program. The authors acknowledge the Summer Undergraduate Research Fellowship at the National Institute of Standards and Technology (NIST) Center for Neutron Research for Lisa J. Krayer. Hyoungjeen Jeen was supported by the National Research Foundation of Korea (NRF-2017K1A3A7A09016305). Use of the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (under Contract No. DE-AC02-98CH10886). Support for Lisa A. Krayer was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement No. DMR-1508249. The research was performed in part at the NIST Center for Nanoscale Science and Technology. This research used resources of the Compute and Data Environment for Science (CADES) at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.