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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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Giant Magnetostriction in Ferrimagnetic SmFe5As3.
Oksana Karychort1,2, Jan Priessnitz3, Volodymyr Buturlim4
1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany.
Angewandte Chemie (International Ed. in English)
|March 25, 2026
Summary
A new magnetostrictive material, SmFe5As3, exhibits giant magnetostriction and complex magnetic and structural transitions. This discovery opens avenues for advanced spintronics and energy harvesting applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Chemistry
Background:
- Magnetostrictive materials are crucial for applications like spintronics and energy harvesting.
- Understanding the interplay between magnetic properties, crystal structure, and magnetostriction is key for developing new materials.
Purpose of the Study:
- To investigate the magnetic, structural, and magnetostrictive properties of the novel material SmFe5As3.
- To characterize the phase transitions and their correlation with structural changes.
Main Methods:
- Magnetic susceptibility measurements.
- Band-structure calculations.
- X-ray absorption near-edge structure (XANES) measurements.
- Dilatometry on single crystals.
Main Results:
- SmFe5As3 exhibits a ferrimagnetic ground state, transitioning to a ferromagnetic state at 28 K and then to a paramagnetic state at 76 K.
- Structural phase transitions accompany the magnetic transitions, all described by the UCr5P3 type structure with varying Fe-As framework deformation.
- Giant magnetostriction of 2500 x 10^-6 was observed, with diverse thermo-elastic effects (negative, zero, and positive).
Conclusions:
- SmFe5As3 is a novel magnetostrictive material with complex magnetic and structural behaviors.
- The observed giant magnetostriction and diverse thermo-elastic effects highlight its potential for advanced technological applications.
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