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Progressive pressure-induced transformation from isolated MnX4 (Td) to exchange-coupled MnX6 (Oh) systems in A2MnX4 (X:Cl,Br) crystals

Abstract: This work reports a correlation study between the crystal structure and photoluminescence (PL) in A2MnX4 (A: [CH3]4N; X: Cl, Br) by means of simultaneously optical spectroscopy and x-ray diffraction (XRD) under pressure. These materials are attractive systems for PL studies under pressure since they are very compressible and the interaction between organic/inorganic ((CH3)4N?/MnX42?) tetrahedra strongly affects the PL efficiency, which is fully related to the isolated Td MnX42?. We show that pressure induces strong redshifts of emission peak of MnX42? as well as decomposition processes at higher pressures yielding new aggregated phases of Mn2+ and amorphization which deeply affect Mn2+ PL. The equation of state of each compound is reported from XRD data.

Otras comunicaciones del congreso o articulos relacionados con autores/as de la Universidad de Cantabria

 Autoría: Nataf L., Rodríguez-Lazcano Y., Aguado F., Rodríguez F., Wilhelm H., Jephcoat A.,

 Congreso: International Conference on High Pressure Science and Technology, Joint AIRAPT-22 & HPCJ-50 (22º : 2009 : Tokio)

Editorial: Institute of Physics

 Año de publicación: 2010

Nº de páginas: 5

Tipo de publicación: Comunicación a Congreso

 DOI: 10.1088/1742-6596/215/1/012043

ISSN: 1742-6588,1742-6596

 Proyecto español: MAT2008-06873-C02-01/MAT

Url de la publicación: https://doi.org/10.1088/1742-6596/215/1/012043

Autoría

LUCIE NATAF

YAMILET RODRIGUEZ LAZCANO

WILHELM, H.

JEPHCOAT, A.