Electron paramagnetic resonance was measured in ${\mathrm{In}}_{1-x}{\mathrm{Mn}}_x\mathrm{As}$ epilayers with $0.0014<~x<~0.014,$ with the intention of identifying the state of the Mn ion when it enters the InAs lattice. The data were taken at low temperatures. The observed spectra were attributed to ionized Mn acceptor $A^{-}{(d}^5).\mathrm{}$ No neutral Mn acceptor centers ${(d}^5+h)$ were detected.

• Received 23 December 1999

DOI:https://doi.org/10.1103/PhysRevB.63.085315