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Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies

Shepherd, H.J., Bonnet, S., Guionneau, P., Bedoui, S., Garbarino, G., Nicolazzi, W., Bousseksou, A., Molnár, G. (2011) Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies. Physical Review B - Condensed Matter and Materials Physics, 84 (14). p. 144107. ISSN 10980121 (ISSN). E-ISSN 1550-235X. (doi:10.1103/PhysRevB.84.144107) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
https://doi.org/10.1103/PhysRevB.84.144107

Abstract

We have used single-crystal x-ray diffraction, Raman spectroscopy, and magnetometry to investigate the effect of hydrostatic pressures up to 16 kbar on the molecular spin crossover complex [FeII(bapbpy)(NCS)2]. A stepped first-order transition from the high-spin (HS) to low-spin (LS) phase was observed upon compression of single-crystal samples. The intermediate phase (IP) is stable between 4 and 11 kbar at room temperature. This phase is characterized by supercell reflections and tripling of the c-axis of the unit cell (C2/c) due to the formation of a periodic [HS-LS-LS] structural motif, as seen in the thermal stepped transition. The pressure-temperature phase diagram reveals an anomalous increase of the thermal hysteresis widths with increasing pressure and the stabilization of the IP across the investigated P-T space. © 2011 American Physical Society.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.84.144107
Additional information: Unmapped bibliographic data: C7 - 144107 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - Laboratoire de Chimie de Coordination, CNRS UPR-8241, INP, Toulouse, France [Field not mapped to EPrints] AD - CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr A. Schweitzer, F-33608 Pessac, France [Field not mapped to EPrints] AD - Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, Netherlands [Field not mapped to EPrints] AD - European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz, 38043 Grenoble Cedex, France [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 22 Oct 2015 08:19 UTC
Last Modified: 23 Jan 2020 04:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50832 (The current URI for this page, for reference purposes)
Shepherd, H.J.: https://orcid.org/0000-0003-0832-4475
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