高压研究对于提高超导转变温度和探索高温超导机制是一种非常重要的手段.环境压力下Tl-1223相单晶样品和Tl-1223和Tl-1212相混合单晶样品的抗磁起始转变温度分别为102K和116K.高压研究表明Tl-1223相单晶样品的初始压力系数为dTc/dp=4.2K/Gpa,当压力达到6.4Gpa时,Tc达到最大值116K,比环境压力下升高了14K.Tl-1223和Tl-1212相混合单晶的初始压力系数为dTc/dp=2.5K/Gpa,当压力达到5.4Gpa时,Tc达到最大值121K,比环境压力下升高了14K.
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