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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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A new layered iron arsenide superconductor: (Ca,Pr)FeAs2
Hiroyuki Yakita1, Hiraku Ogino, Tomoyuki Okada
1Department of Applied Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|January 7, 2014
Summary
A novel iron-based superconductor, (Ca,Pr)FeAs2, was discovered with superconductivity observed around 20 K. This new material exhibits a unique crystal structure with potential for future superconducting applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Superconductivity is a quantum mechanical phenomenon observed in certain materials, enabling lossless electrical current.
- Iron-based superconductors are a significant class of materials exhibiting superconductivity, offering potential for technological advancements.
Purpose of the Study:
- To report the discovery of a new iron-based superconductor, denoted as (Ca,Pr)FeAs2.
- To characterize the crystal structure and superconducting properties of this newly discovered phase.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
- Magnetization and resistivity measurements were conducted to assess superconducting behavior.
Main Results:
- A new phase, (Ca,Pr)FeAs2, was successfully synthesized in plate-like crystal forms.
- The crystal structure was identified as monoclinic with space group P2₁/m, featuring Ca(Pr) planes, Fe2As2 layers, and As2 zigzag chains.
- Superconductivity was confirmed with a critical temperature (T(c)) of approximately 20 K.
Conclusions:
- The discovery of (Ca,Pr)FeAs2 expands the family of iron-based superconductors.
- The unique crystal structure and observed superconductivity highlight the potential for further research into this material system.
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