Related Experiment Video
Updated: Jun 29, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.1K
Enhanced weak superconductivity in trigonalγ-PtBi2.
J Zabala1, V F Correa1, F J Castro1
1Centro Atómico Bariloche and Instituto Balseiro, CNEA, CONICET and U. N. de Cuyo, 8400 San Carlos de Bariloche, Argentina.
Summary
Superconductivity was observed in trigonal γ-PtBi2 at 1.1K, exhibiting high critical magnetic fields but low critical current density. These findings suggest an inhomogeneous superconducting state in this material.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Superconductivity
Background:
- Superconducting materials are crucial for energy-efficient technologies.
- Investigating novel materials with unique superconducting properties is essential for advancing scientific understanding and technological applications.
Purpose of the Study:
- To investigate the superconducting properties of trigonal γ-PtBi2 single crystals.
- To determine the critical temperature (Tc), critical magnetic field (Hc2), and critical current density (Jc) of γ-PtBi2.
- To explore the anisotropy and homogeneity of superconductivity in γ-PtBi2.
Main Methods:
- Electrical resistivity measurements were performed on high-quality single crystals of trigonal γ-PtBi2.
- Critical magnetic field (Hc2) and critical current density (Jc) were measured as a function of temperature and magnetic field.
- Magnetization experiments (field-cooling/zero-field-cooling) were conducted to assess superconducting homogeneity.
Main Results:
- Superconductivity was observed at a critical temperature (Tc) of 1.1K.
- An enhanced critical magnetic field (μ0Hc2(0)) exceeding 1.5 Tesla and a low critical current density (Jc(0)) of approximately 40 A cm⁻² were recorded.
- Weak anisotropy (Γ < 1) and a broadening/asymmetry of the superconducting transition under magnetic field were observed, indicating an inhomogeneous superconducting state.
Conclusions:
- Trigonal γ-PtBi2 exhibits superconductivity with notable critical field properties at ambient pressure.
- The observed low critical current density and transition broadening suggest an inhomogeneous superconducting state.
- Further research is needed to understand the underlying mechanisms and potential applications of this material.
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