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Title: Hysteretic behavior of Fe(phen){sub 2}(NCS){sub 2} spin-transition microparticles vs. the environment: A huge reversible component resolved by first order reversal curves

We discuss the influence of the embedding matrix on the thermal hysteretic behavior of spin transition microparticles of Fe(phen){sub 2}(NCS){sub 2} by using a series of experimental first order reversal curves (FORCs). The shape of FORCs supports the hypothesis considering additional interactions between the spin-transition microparticles and the embedding matrix, which compares to a negative pressure on the particles. A mean-field approach based on negative variable external pressures, together with a cut off/switch on of particles-matrix interactions accounts for the experimental features.
Authors:
; ;  [1] ; ;  [2]
  1. Faculty of Physics, “Alexandru Ioan Cuza” University, 700506 Iasi (Romania)
  2. ICMMO, ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay Cedex (France)
Publication Date:
OSTI Identifier:
22280603
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; DIAGRAMS; IRON COMPOUNDS; MATRIX MATERIALS; MEAN-FIELD THEORY; ORGANIC NITROGEN COMPOUNDS; ORGANIC SULFUR COMPOUNDS; PARTICLE SIZE; PARTICLES; SPIN; TEMPERATURE DEPENDENCE