CeCoIn is a member of a rich family of heavy-fermion compounds. CeIn is heavy-fermion metal with cubic crystal structure that orders antiferromagnetically below 10K. With applying external pressure, antiferromagnetism in CeIn is continuously suppressed, and a superconducting dome emerges in the phase diagram near the antiferromagnetic quantum critical point. CeCoIn has a tetragonal crystal structure, and the unit cell of CeCoIn can be considered as CeIn with an additional CoIn layer per unit cell.
Closely related to CeCoIn is the heavy-fermion material CeRhIn, which has the same crystal structure and which orders antiferromagnetically below 4K, but does not become superconducting at ambient pressure. At high pressure CeRhIn becomes superconducting with a maximum T slightly above 2 K at a pressure around 2 GPa, and at the same pressure the Fermi surface of CeRhIn changes  suggesting so-called local quantum criticality. 
Also the compound PuCoGa, which is a superconductor with T approximately 18.5 K and which can be considered an intermediate between heavy-fermion and cuprate superconductors, has the same crystal structure.
Growth of single-crystalline CeCoIn has been very successful soon after the discovery of the material, and large single crystals of CeCoIn, such as required for inelastic neutron scattering, have been prepared. (In contrast to some other heavy-fermion compounds where single-crystal growth is more challenging.)