Transport and T-c anomalies around x=0.22 in La2-xSrxCu1-yMyO4 (M = Zn, Ga, Ni): Possibility of charge and/or spin ordering

Transport and T-c anomalies around x = 0.22 in La2-xSrxCuO4 have been studi ed through the partial substitution of Zn, Ga and Ni for Cu. It has been fo und that the value of x where the anomalies occur shifts to lower x values through the Zn substitution, while it shifts to larger x values through the Ga substitution, and it disappears through the Ni substitution. There is a possibility that an order of holes and/or spins, such as the so-called str ipe order, is formed or fluctuates around x = 0.22 in La2-xSrxCuO4. PACS nu mbers: 74.25.Fy, 74.62.-c, 74.62.Dh, 74.72.Dn.