Metamagnetism in Cobalt Phosphates with Pillared Layer Structures: [Co<sub>3</sub>(pyz)(HPO<sub>4</sub>)<sub>2</sub>F<sub>2</sub>] and [Co<sub>3</sub>(4,4'-bpy)(HPO<sub>4</sub>)<sub>2</sub>F<sub>2</sub>]-xH<sub>2</sub>O
Autores:John D. Shang-Fan Lee, John D. Wei-Kuo Chang