Electronic transport properties of spin-crossover polymer plus polyaniline composites with Fe₃O₄ nanoparticles

Authors

• Esha Mishra, University of Nebraska-Lincoln, Berry College
• WaiKiat Chin, University of Nebraska-Lincoln
• Kayleigh A. McElveen, University of Nebraska-Lincoln
• Thilini K. Ekanayaka, University of Nebraska-Lincoln
• M. Zaid Zaz, University of Nebraska-LincolnFollow
• Gauthami Viswan, University of Nebraska-LincolnFollow
• Ruthi Zielinski, University of Nebraska-Lincoln
• Alpha T. N'Diaye, Lawrence Berkeley National Laboratory
• David Shapiro, Lawrence Berkeley National Laboratory
• Rebecca Lai, University of Nebraska - LincolnFollow
• Robert Streubel, University of Nebraska-LincolnFollow
• Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

1-4-2023

Citation

Esha Mishra et al 2024 J. Phys. Mater. 7 015010. https://doi.org/10.1088/2515-7639/ad1b35

Comments

Open access.

Abstract

Adding Fe₃O₄ nanoparticles to composites of [Fe(Htrz)₂(trz)](BF₄) spin-crossover polymer and polyaniline (PANI) drives a phase separation of both and restores the molecular structure and cooperative effects of the spin-crossover polymer without compromising the increased conductivity gained through the addition of PANI. We observe an increased on-off ratio for the DC conductivity owing to an enlarged off state resistivity and a 20 times larger AC conductivity of the on state compared with DC values. The Fe₃O₄ nanoparticles, primarily confined to the [Fe(Htrz)₂(trz)](BF₄) phase, are ferromagnetically coupled to the local moment of the spin-crossover molecule suggesting the existence of an exchange interaction between both components.