Exotic Magnetism of a Triangular Chain Structure

August 29, 2023
Exotic Magnetism of a Triangular Chain Structure
Evolution of the magnetic structure of CsCo2(MoO4)2(OH) with an applied magnetic field. The magnetization M(H) was measured on a single crystal of the material with field along the b-axis. Red and Green arrows correspond to magnetic spins at the two Co sites, forming the various field tunable geometrically frustrated magnetic chain.

Scientific Achievement

The work shows that magnetic cobaltates (Co2+, 3d7) could host the pseudospin-1/2 magnetism. The sawtooth chain compound CsCo2(MoO4)2(OH), is one such magnetic system possesses complex magnetism that evolves with the temperature and the applied magnetic field.

Significance and Impact

This work highlights the important role of crystal engineering to achieve a triangular chain structure which exhibits exotic quantum properties of the Co2+ in triangular magnetic lattice.

Research Details

  • CsCo2(MoO4)2(OH) was synthesized using high-temperature high-pressure hydrothermal method.
  • Magnetic structure was characterize using neutron powder diffraction under applied magnetic field.
  • The magnetic properties of CsCo2(MoO4)2(OH) exhibit a strong coupling to the crystal lattice and its magnetic ground state can be easily manipulated by an applied magnetic field.

“Field tunable magnetic transitions of CsCo2(MoO4)2(OH): a triangular chain structure with a frustrated geometry”
Liurukara D Sanjeewa, V. Ovidiu Garlea, Randy S. Fishman, Mahsa Foroughian, Li Yin, Jie Xing David S. Parker, Tiffany M. Smith Pellizzeri, Athena S. Sefat, Joseph W. Kolis,
Materials Chemistry Frontiers, 7, 1058–1071 (2023). DOI: https://doi.org/10.1039/D2QM01272C