Absence of magnetic ordering in the spin liquid candidate Ca 3 Cu 2 GeV 2 O 12

: Typically, quantum spin liquid candidates can be found in materials with a combination of geometrical frustration along with low spin. Due to its spin of S=1/2 the copper (II) ion is often present in the discussion on spin liquid candidates. The solid state compound Ca3Cu2GeV2O12is a material that crystallizes in the garnet structure (s.g. #230,Ia-3d), where 3-dimensional frustration is known to occur. Heat capacity has shown a lack of magnetic ordering down to 0.35 K, confirmed with low temperature neutron diffraction to 0.07 K. This system displays a Weiss temperature of -0.93(1) K indicating net antiferromagnetic interactions and significant J1-J2competition causing frustration. Using both neutron and X-ray diffraction along with heat capacity and magnetometry, the work presented here shows Ca3Cu2GeV2O12has potential as a new spin liquid candidate.