High-pressure single-crystal XRD and magnetic study of a octacyanoniobate-based magnetic sponge

作者：Pinkowicz Dawid^*; Kurpiewska Katarzyna; Lewinski Krzysztof; Balanda Maria; Mihalik Marian; Zentkova Maria; Sieklucka Barbara

来源：CrystEngComm, 2012, 14(16): 5224-5229.

DOI：10.1039/c2ce25387a

In the present study we report the structural and magnetic response of the 3-D cyano-bridged magnetic sponge-like system {[Mn-II(pydz)(H2O)(2)][Mn-II(H2O)(2)][Nb-IV(CN)(8)]center dot 3H(2)O}(n) A to external pressure up to 1.8 GPa using single-crystal crystallography and magnetic measurements. The observed pressure-induced structural changes: shrinkage of the Nb-C bonds and bending of Mn-NC-Nb linkages are responsible for the strengthening of the antiferromagnetic interactions between Mn and Nb centers and consequently for the substantial increase of the magnetic ordering temperature from 43 K to 51 K under 0.57 GPa. The observed magneto-structural response to external pressure is similar in nature to the removal of guest molecules and confirms the significant susceptibility of molecular magnetic sponges to mechanical stress.

• 出版日期2012