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$$mu$$SR study of magnetic order in La$$_{2-x}$$Ba$$_x$$CuO$$_4$$ under high pressure

Sato, Koki*; Goko, Tatsuro*; Takeshita, Satoshi*; Hayashi, Yuko*; Arai, Juichiro*; Higemoto, Wataru; Nishiyama, Kusuo*; Nagamine, Kanetada*

We have performed muon spin relaxation and resistivity measurements under high pressure in La$$_{2-x}$$Ba$$_x$$CuO$$_4$$ with x=0.125 and 0.135. With increasing pressure, the superconducting critical temperature increases for both samples. Even by applying pressure, static magnetic order still exists. This result indicates the LTT structure is not always necessary for stabilizing the static magnetic order. However, the magnetic volume fraction estimated is reduced by applying pressure. The reduction of the magnetic volume fraction for x=0.125 is less than that for x=0.135. This means hole concentration is one of the important factors for the appearance of the static magnetic order.

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Category:Physics, Condensed Matter

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