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首页> 外文期刊>Physica, C. Superconductivity and its applications >Magnetic phase diagram in a HgBa_2CuO_(4+#delta#) single crystal
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Magnetic phase diagram in a HgBa_2CuO_(4+#delta#) single crystal

机译:HgBa_2CuO_(4 +#delta#)单晶的磁相图

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The irreversibility magnetic field H_(irr)(T) decreases exponentially in the temperature range 20 <= T <= 88 K. At T_* approx.= 88 K, the H_(irr)(T) curve changes slope abruptly and a new mechanism controls the irreversibility up to T_c. The hysteresis loops measurements (H || c) show a second peak for 5 <= T <= 50 K. Relaxation measurements performed in the region of the second peak show, at constant temperature, that effective activation energy U_o(H) first increases up to H_(sp)'(T) and then decreases for H > H_(sp)'(T). H_(sp)'(T) is located lower than the field H_(sp)(T) deduced from the hysteresis loops.
机译:在20 <= T <= 88 K的温度范围内,不可逆磁场H_(irr)(T)呈指数下降。在T_ *大约= 88 K时,H_(irr)(T)曲线突然改变斜率,新的机制控制不可逆性直到T_c。磁滞回线测量值(H || c)显示5 <= T <= 50 K的第二个峰。在第二个峰的区域中执行的弛豫测量显示,在恒定温度下,有效活化能U_o(H)首先增加直到H_(sp)'(T),然后减小,直到H> H_(sp)'(T)。 H_(sp)'(T)的位置低于从磁滞回线推导出的字段H_(sp)(T)。

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