Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2024

Interplay between transition-metal K-edge XMCD, slight structural distortions and magnetism in a series of trimetallic (CoxNi(1− x))4[Fe(CN)6]3/8 Prussian blue analogues

Résumé

The magnetic properties of a series of trimetallic (Co,Ni)Fe Prussian blue analogues (PBAs) were investigated by SQUID magnetometry and X-ray magnetic circular dichroism (XMCD) at the three transition metal (TM) K-edges. In turn, the PBA trimetallic series was used as a tool in order to better understand the information contained in TM K-edge XMCD and particularly the chemical nature of the probed species (extended sub-lattice or localized entities). The results show that the magnetic behavior of the compounds is dictated by competing exchange interactions between the Co–Fe and Ni–Fe pairs, without spin frustration. They also show that XMCD at the TM K-edge is a local atomic probe of the element at the N side of the cyanide bridge and a local probe of the absorbing atom and its first magnetic neighbors on the C side of the bridge. At last, XMCD at the TM K-edge turns out to be highly sensitive to very small structural distortions.

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hal-04690226 , version 1 (04-10-2024)

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Adama N’Diaye, Amélie Bordage, Lucie Nataf, François Baudelet, Eric Rivière, et al.. Interplay between transition-metal K-edge XMCD, slight structural distortions and magnetism in a series of trimetallic (CoxNi(1− x))4[Fe(CN)6]3/8 Prussian blue analogues. Physical Chemistry Chemical Physics, 2024, 26 (21), pp.15576-15586. ⟨10.1039/d3cp04749k⟩. ⟨hal-04690226⟩
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