Absence of Magnetic Order in Dichloro [1,2-bis (diphenylphosphino) ethane] Nickel2+ 2 Single Crystal

Dichloro [1,2-bis (diphenylphosphino) ethane] nickel2+ (NiCl2(dppe)) is an organic compound containing C26H24P2(dppe) molecules and Cl- , Ni2+ ions. The large-size NiCl2(dppe) single crystals with longest dimension of 4 mm were grown by the method of slow evaporation of organic solution. Single crystal X-ray diffraction spectrum indicates that the single crystal is of high quality. Magnetization results of the NiCl2(dppe) single crystals show an anisotropic paramagnetism behavior and diamagnetic background, which comes from Ni 2+ ions and benzene ring, respectively. However, according to specific heat results with temperature down to 0.1 K and magnetic field up to 14T, no expected field-induced quantum phase transition was observed in NiCl2(dppe) single crystals.