Room temperature multiferroicity and magnetodielectric coupling in 0–3 composite thin films

Abstract

Magnetoelectric (ME) composite thin films are promising candidates for novel applications in future nanoelectronics, spintronics, memory, and other multifunctional devices as they exhibit much higher ME coupling and transition temperatures (Tc) than well-known single phase multiferroics discovered to date. Among the three types of multiferroic composite nanostructures, (2–2) layered and (1–3) vertically aligned composite nanostructures exhibit comparatively smaller ME coupling due to different shortcomings that restrict their use in many applications. Here, we study the morphological, piezoresponse force microscopic (PFM), ferroelectric, magnetic, and magnetodielectric properties of 0–3 [magnetic nanoparticles (0) homogeneously distributed in ferroelectric matrices (3)] multiferroic composite thin films. The Pb(Fe0.5Nb0.5)O3 (PFN)–Ni0.65Zn0.35Fe2O4 (NZFO) particulate composite films were synthesized by pulsed laser deposition. These particulate composite thin films are completely c-axis oriented with very low surface roughness. We observed magnetic and ferroelectric Tc above room temperature (RT) for all composite thin films. The PFN–NZFO 0–3 composites exhibit large polarization, high saturated magnetization with low coercive field, and low dielectric loss along with magnetodielectric coupling at RT. These nanocomposites might be utilized in next generation nano/microelectronics and spintronic devices.

Document Details

Document Type
Pub Defense Publication
Publication Date
May 19, 2020
Source ID
10.1063/5.0004480

Entities

People

  • Ashok Kumar
  • Dhiren K. Pradhan
  • Dillip K. Pradhan
  • Philip D. Rack
  • Proloy T. Das
  • Ram S. Katiyar
  • Rama K. Vasudevan
  • Sergei V. Kalinin
  • Shalini Kumari
  • Sita Dugu
  • Venkata S Puli

Organizations

  • National Physical Laboratory
  • Oak Ridge National Laboratory
  • Pennsylvania State University
  • United States Department of Defense
  • United States Department of Energy
  • University of Tennessee

Tags

Fields of Study

  • Materials science
  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Biotechnology
  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition
  • Microelectronics
  • Microelectronics - Graphene