Electronic transport properties of spin-crossover polymer plus polyaniline composites with Fe 3 O 4 nanoparticles

Mishra, Esha; Chin, WaiKiat; McElveen, Kayleigh A.; Ekanayaka, Thilini K.; Zaz, M. Zaid; Viswan, Gauthami; Zielinski, Ruthi; N’Diaye, Alpha T.; Shapiro, David; Lai, Rebecca Y.; Streubel, Robert; Dowben, Peter A.

doi:10.1088/2515-7639/ad1b35

Title: Electronic transport properties of spin-crossover polymer plus polyaniline composites with Fe ₃ O ₄ nanoparticles

Journal Article · 15 January 2024 · JPhys Materials

DOI: https://doi.org/10.1088/2515-7639/ad1b35 · OSTI ID:2281415

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Abstract Adding Fe ₃ O ₄ nanoparticles to composites of [Fe(Htrz) ₂ (trz)](BF ₄ ) 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 Fe ₃ O ₄ nanoparticles, primarily confined to the [Fe(Htrz) ₂ (trz)](BF ₄ ) phase, are ferromagnetically coupled to the local moment of the spin-crossover molecule suggesting the existence of an exchange interaction between both components.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2281415

Journal Information:: JPhys Materials, Journal Name: JPhys Materials Journal Issue: 1 Vol. 7; ISSN 2515-7639

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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