Characterization of Doped $\mathbf{CeCoIn_5}$

Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467. Los Alamos National Laboratory, Los Alamos, New Mexico 87545. $\mathrm{CeCoIn_5}$ is an unconventional, d-wave, heavy fermion superconductor with a critical temperature of $\sim$2.3K. The physical properties of doped samples of $\mathrm{CeCo_{1-x}M_{x}In_5}$, where M is Fe, Cr, Rh, Ru, Ir, Mn, Ni, V, or Cu for $\rm{x} \le 0.03$, are characterized. Resistivity, magnetoresistance, and magnetization are measured in a temperature range 5 - 300K and magnetic field up to 9 Tesla; the magnetization is measured using a capacitive cantilever magnetometer. The effect of the dopants on resistivity and magnetization, with regard to percentage x present in the sample, provides valuable insight into the character of the parent material $\mathrm{CeCoIn_5}$. Implications of magnetic, diamagnetic, and non-magnetic doping of $\mathrm{CeCoIn_5}$ will be discussed.