Open AccessPiezoresistive Effect in the [Fe(Htrz)2(trz)](BF4) Spin Crossover Complex
Author(s) -
Andrei Diaconu,
Simona-Lacramioara Lupu,
Ionela Rusu,
Ioan Marian Risca,
Lionel Salmon,
Gábor Molnár,
Azzedine Bousseksou,
Philippe Demont,
Aurelian Rotaru
Publication year - 2017
Publication title -
the journal of physical chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.563
H-Index - 203
ISSN - 1948-7185
DOI - 10.1021/acs.jpclett.7b01111
Subject(s) - piezoresistive effect , spin crossover , hydrostatic pressure , hysteresis , bar (unit) , analytical chemistry (journal) , materials science , phase diagram , electrical resistivity and conductivity , conductivity , dielectric , chemistry , phase (matter) , condensed matter physics , thermodynamics , composite material , crystallography , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics , meteorology
We report on the effect of hydrostatic pressure on the electrical conductivity and dielectric permittivity of the [Fe(Htrz) 2 (trz)](BF 4 ) (Htrz = 1H-1,2,4,-triazole) spin crossover complex. Variable-temperature and -pressure broad-band impedance spectrometry revealed a piezoresistive effect of more than 1 order of magnitude for pressures as low as 500 bar, associated with a large pressure-induced hysteresis of 1700 bar. The origin of the piezoresistive effect has been attributed to the pressure-induced spin state switching in the complex, and the associated P,T phase diagram was determined.
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