0000000000525814

AUTHOR

Marcelo Ceolín

showing 2 related works from this author

Mössbauer thermal scan study of a spin crossover system

2010

Programmable Velocity equipment was used to perform a Mössbauer Thermal Scans to allow a quasi-continuous temperature study of the magnetic transition between the low-spin and a high-spin configurations in [Fe(Htrz)2(trz)](BF4) system. The material was studied both in bulk as in nanoparticles sample forms.

PhotonsHistoryRadiationPhotonChemistryMossbauer spectroscopyAnalytical chemistryNanoparticleRadiationFluorescenceComputer Science ApplicationsEducationSpin crossoverQuantum theoryThermalMössbauer spectroscopyCiencias ExactasJournal of Physics: Conference Series
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Tuning size and thermal hysteresis in bistable spin crossover nanoparticles.

2010

Nanoparticles of iron(II) triazole salts have been prepared from water-organic microemulsions. The mean size of the nanoparticles can be tuned down to 6 nm in diameter, with a narrow size distribution. A sharp spin transition from the low spin (LS) to the high spin (HS) state is observed above room temperature, with a 30-40-K-wide thermal hysteresis. The same preparation can yield second generation nanoparticles containing molecular alloys by mixing triazole with triazole derivatives, or from metallic mixtures of iron(II) and zinc(II). In these nanoparticles of 10-15 nm, the spin transition "moves" towards lower temperatures, reaching a 316 K limit for the cooling down transition and mainta…

SiliconMolecular StructureSurface PropertiesSpin transitionAnalytical chemistryTemperatureNanoparticlechemistry.chemical_elementWaterNanotechnologyTriazolesMagnetic susceptibilityInorganic ChemistryMetalDynamic light scatteringchemistrySpin crossovervisual_artvisual_art.visual_art_mediumNanoparticlesMicroemulsionFerrous CompoundsPhysical and Theoretical ChemistryParticle SizeInorganic chemistry
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