Investigation of the photoinduced magnetization of copper octacyanomolybdates nanoparticles by X-ray magnetic circular dichroism

Sophie Brossard; Florence Volatron; Laurent Lisnard; Marie-Anne Arrio; Laure Catala; Corine Mathonière; Talal Mallah; Christophe Cartier dit Moulin; Andrei Rogalev; Fabrice Wilhelm; Alevtina Smekhova; Philippe Sainctavit

doi:10.1021/ja204594a

Investigation of the photoinduced magnetization of copper octacyanomolybdates nanoparticles by X-ray magnetic circular dichroism

J Am Chem Soc. 2012 Jan 11;134(1):222-8. doi: 10.1021/ja204594a. Epub 2011 Dec 12.

Authors

Sophie Brossard¹, Florence Volatron, Laurent Lisnard, Marie-Anne Arrio, Laure Catala, Corine Mathonière, Talal Mallah, Christophe Cartier dit Moulin, Andrei Rogalev, Fabrice Wilhelm, Alevtina Smekhova, Philippe Sainctavit

Affiliation

¹ Institut de Minéralogie et de Physique des Milieux Condensés, CNRS UMR 7590, Université Pierre et Marie Curie, 4 place Jussieu, Case 115, 75252 Paris cedex 05, France.

PMID: 22091848
DOI: 10.1021/ja204594a

Abstract

Through an extensive set of SQUID magnetic measurements, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism, we have determined the nature of the metastable photomagnetic phase in the cyano-bridged 3D network Cs(2)Cu(7)[Mo(CN)(8)](4). The photomagnetic effect is induced by the photoconversion of Mo(IV) ions in low spin (LS) configuration (S = 0) into Mo(IV) ions in high spin (HS) configuration (S = 1). The magnetic and spectroscopic measurements fully support the LS to HS conversion, whereas the previously invoked charge transfer mechanism Mo(IV) + Cu(II) ⇒ Mo(V) + Cu(I) can be completely ruled out.