As-grown epitaxial composition-spread thin films of a colossal magnetoresistive compound, La1-xSrxMnO3 (0 less than or equal to x less than or equal to 1), are fabricated by a combinatorial laser molecular beam epitaxy (laser MBE). High throughput characterization for studying x dependencies of structural, magnetic and electronic properties is demonstrated by the combination of a concurrent X-ray diffractometer, a scanning superconducting quantum interference device (SQUID) microscope and an infrared microscope spectrometer, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.