Stabilizing new bismuth compounds in thin film form
- PDF / 812,334 Bytes
- 8 Pages / 584.957 x 782.986 pts Page_size
- 48 Downloads / 180 Views
Honghui Zhou Department of Materials Science and Engineering, NSF Center for Advanced Materials and Smart Structures, North Carolina State University, Raleigh, North Carolina 27695, USA
Yuanyuan Zhu Physical & Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
Leigang Li and Wenrui Zhang Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA
Jagdish Narayan Department of Materials Science and Engineering, NSF Center for Advanced Materials and Smart Structures, North Carolina State University, Raleigh, North Carolina 27695, USA
Haiyan Wang Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA; and School of Materials Engineering, Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
Quanxi Jiab) Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA (Received 6 June 2016; accepted 6 October 2016)
Growth of unexpected phases from a composite target of BiFeO3:BiMnO3 and/or BiFeO3:BiCrO3 has been explored using pulsed laser deposition. The Bi2FeMnO6 tetragonal phase can be grown directly on SrTiO3 (STO) substrate, while two phases (S1 and S2) were found to grow on LaAlO3 (LAO) substrates with narrow growth windows. However, introducing a thin CeO2 buffer layer effectively broadens the growth window for the pure S1 phase, regardless of the substrate. Moreover, we discovered two new phases (X1 and X2) when growing on STO substrates using a BiFeO3:BiCrO3 target. Pure X2 phase can be obtained on CeO2-buffered STO and LAO substrates. This work demonstrates that some unexpected phases can be stabilized in a thin film form by using composite perovskite BiRO3 (R 5 Cr, Mn, Fe, Co, Ni) targets. Furthermore, it also indicates that CeO2 can serve as a general template for the growth of bismuth compounds with potential room-temperature multiferroicity.
I. INTRODUCTION
The synthesis of complex oxides with multiple transition metals has attracted much attention in the past decades as these materials could exhibit emergent properties. Recent advances in controlled growth of thin films have provided unique opportunities to grow novel complex oxides, which are inaccessible in bulk process. Pulsed laser deposition (PLD) is a relatively simple and very versatile technique for thin film growth.1 Different architectures including heterostructures,2–4 Contributing Editor: Ian M. Reaney Address all correspondence to these authors. a) e-mail: [email protected] b) e-mail: [email protected] DOI: 10.1557/jmr.2016.391
superlattices,5–7 and vertical heteroepitaxial nanocomposites,8–10 have been reported. Recent efforts on vertical heteroepitaxial nanocomposites have been focused on the development of multifunctionalities by combining two immiscible phases.11–17 Immiscibility is one of the key factors for nanocomposite formation.18 On the other hand, the co-growth of two miscible or partially miscible phases ca
Data Loading...
