Magneto-elastic coupling in multiferroic metal-organic framework [(CH3)(2)NH2]Co(HCOO)(3)

Metal-organic frameworks based on metal-formates have emerged as a intriguing class of multiferroics with wide range of applications. In this work, we present magneto-Raman spectroscopic investigations on [(CH3)(2)NH2]Co(HCOO)(3) belonging to this family. The spectroscopic studies were performed at magnetic fields up to 31 T at the temperature of 2.3 K. It was observed that the formate bending mode at around 798 cm(-1) shifts to higher energies with increasing magnetic field. The magneto-response of the phonon also exhibits anomalies at magnetic fields of 14.5 T and 23.5 T corresponding to magnetic phase transitions. Based on our results, we conclude that the formate bending mode does play a role in facilitating the saturation of magnetic states similar to its Mn and Ni analogs.

Automated summary

In this study, magneto-Raman spectroscopic investigations were conducted on a metal-organic framework compound belonging to the metal-formate family. The results showed that the formate bending mode shifted to higher energies with increasing magnetic field, and anomalies in the magneto-response of the phonon were observed at specific magnetic fields corresponding to magnetic phase transitions. These findings suggest that the formate bending mode plays a role in facilitating the saturation of magnetic states similar to its Mn and Ni analogs.