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

Journal Article · Mon Jan 20 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4862748· OSTI ID:22280603

Tanasa, Radu; Stancu, Alexandru; Enachescu, Cristian ^[1]; Laisney, Jérôme; Boillot, Marie-Laure ^[2]

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1. Faculty of Physics, “Alexandru Ioan Cuza” University, 700506 Iasi (Romania)
2. ICMMO, ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay Cedex (France)

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.

• OSTI ID: 22280603
• Journal Information: Applied Physics Letters, Vol. 104, Issue 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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