Nano-sized effect of ferromagnetic and antiferromagnetic materials has much attention in the recent years due to their unique properties. In the last beam time, we got 3 days to starting this research and we successfully measured our two samples. The suppression of TN was observed by reducing particle size but the saturated internal field is same with that of bulk-LCO, indicating magnetic structure of Cu spins which appear in nano-LCO is same with that observed in bulk-LCO. We have confirmed that the suppression of TN is not caused by oxygen deficiencies which introduce carriers into the system. Those results have never been observed in the past. Therefore, we want to continue our investigation on magnetic properties of nano-LCO with some difference particle sizes. Besides that,we want to observe Sr 5% doped (La1.95Sr0.05)CuO4 because hole doping is main key issue of the high-Tc cuprate.