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The magnetic behavior and the transport behavior of La0.67-x Smx Sr0.33 MnO3 (x=0.00, 0.10, 0.20, 0.30,0.40, 0. 50 and 0. 60) systems were studied through measuring the M-T curves, electron spin resonance (ESR)curves and ρ-T curves. The samples exhibit a