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Updated: Mar 7, 2026
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Superconductivity at 35 K by self doping in RbGd2Fe4As4O2
Zhi-Cheng Wang1, Chao-Yang He1, Si-Qi Wu1
1Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China.
Summary
Researchers synthesized a new iron oxyarsenide, RbGd2Fe4As4O2, exhibiting bulk superconductivity at 40 K. This novel material shows a high initial slope of the upper critical field, indicating promising superconducting properties.
Area of Science:
- Solid State Chemistry
- Materials Science
- Condensed Matter Physics
Background:
- Iron-based superconductors are a significant area of research due to their unique electronic properties.
- Quinary compounds offer complex structures for exploring novel physical phenomena.
- Understanding the relationship between crystal structure and superconductivity is crucial for material design.
Purpose of the Study:
- To synthesize and characterize a new quinary iron oxyarsenide compound, RbGd2Fe4As4O2.
- To investigate the crystal structure and physical properties, including superconductivity.
- To determine the potential of this material for applications in superconductivity.
Main Methods:
- Single crystal X-ray diffraction for crystal structure determination.
- Electrical resistivity measurements to detect the superconducting transition.
- DC magnetic susceptibility and heat capacity measurements to confirm bulk superconductivity.
Main Results:
- Successful synthesis and structural determination of RbGd2Fe4As4O2, which is isostructural to KCa2Fe4As4F2.
- Demonstration of bulk superconductivity with a critical temperature (Tc) of 40 K.
- Measurement of a high initial slope of the upper critical field (dHc2/dT) for the polycrystalline sample.
Conclusions:
- RbGd2Fe4As4O2 is a novel superconductor with potential for further investigation.
- The self hole-doped Fe2As2 layers contribute to the observed superconductivity.
- The high upper critical field slope suggests robust superconducting behavior.
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