Nd, Ho, Er, and Tm doped lutetium aluminum garnet (LuAG) single crystals were grown using the micro-pulling down (mu-PD) method. The crystals were produced from the melts containing 3 mol% of the dopants. The axial and radial dopant distribution were measured by electron probe micro analysis. Nd3+ and Ho3+ ions concentrated in the rim (k(0) < 1) and the radial concentration showed concave curvature. k(0) is the segregation coefficient of the dopant with respect to the given host phase. In the case of Er3+ and Tm3+ ions, the k(0) value is considered to be nearly 1 and the radial dopant distribution profiles were almost flat. (c) 2011 Elsevier B.V. All rights reserved.