论文标题
高压对金属间超导体Ti $ _ {0.85} $ pd $ _ {0.15} $的高压影响
High pressure effects on the intermetallic superconductor Ti$_{0.85}$Pd$_{0.15}$
论文作者
论文摘要
这项工作报告了金属间Ti $ _ {0.85} $ PD $ _ {0.15} $在正常条件和静水压力下进行的超导性研究。该化合物的晶体结构在室温和大气压下以身体为中心的立方体，作为不稳定的$β$ -TI相。 X射线衍射模式显示空间$ im \ bar {3} m $，带有参数$ a = 3.2226（4）$ÅAND密度在5.6242 g/cm $ $^{3} $附近。超导过渡温度，T $ _ {C} = 3.7 $ K是根据电阻，磁化和特定的热量测量确定的。计算了两个临界磁场，即连贯性长度，Ginzburg-landau参数，伦敦穿透深度，超导能量隙，Debye温度，Fermi水平上的电子耦合常数和状态的密度。这些参数是在环境压力下获得的。在静水压力下，磁敏感性测量显示在T $ _ {C} $上的较小增量，最大t $ _ {C} = 3.83 $ K的最大施加压力为1.03 GPA。 T $ _ {C} $计算的斜率作为压力的线性函数约为0.14 K/gpa，可能与状态的电子密度增加有关。
This work reports superconductivity studies in the intermetallic Ti$_{0.85}$Pd$_{0.15}$ performed in normal conditions and under hydrostatic pressure. The crystal structure of the compound has a body centered cubic at room temperature and atmospheric pressure as unstable $β$-Ti phase. X-Ray diffraction pattern shows space group $Im\bar{3}m$ with parameter $a=3.2226(4)$ Åand density around 5.6242 g/cm$^{3}$. The superconducting transition temperature, T$_{C}=3.7$ K was determined from resistance, magnetization, and specific heat measurements. The two critical magnetic fields, the coherence length, Ginzburg-Landau parameter, London penetration depth, the superconducting energy gap, the Debye temperature, the electron-phonon coupling constant and density of states at the Fermi level were calculated. These parameters were obtained at ambient pressure. Under hydrostatic pressure, the magnetic susceptibility measurements show a small increment on T$_{C}$, the maximum T$_{C}=3.83$ K was obtained at the maximum applied pressure of 1.03 GPa. The slope calculated for T$_{C}$ as a linear function of pressure was about 0.14 K/GPa, possibly associated with an increase in the electronic density of states.
