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Updated: Jun 3, 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
A study on the magnetic behaviour of polymorphic YbFe6Ge6
1Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, Canada. cadogan@physics.umanitoba.ca
Summary
The intermetallic compound Ytterbium iron germanide (YbFe(6)Ge(6)) exhibits distinct magnetic behaviors in two related hexagonal crystal structures. Iron (Fe) atoms order antiferromagnetically, but their magnetic moments reorient differently with temperature in each structure.
Area of Science:
- Materials Science
- Solid State Physics
- Crystallography
Background:
- The intermetallic compound YbFe(6)Ge(6) is known to exist in two closely related hexagonal crystal structures: HfFe(6)Ge(6)-type and YCo(6)Ge(6)-type.
- Understanding the magnetic properties and crystal structure relationships in such intermetallic compounds is crucial for developing new magnetic materials.
Purpose of the Study:
- To investigate the magnetic ordering and spin reorientation phenomena in YbFe(6)Ge(6) within its two distinct hexagonal crystal structures.
- To elucidate the differences in magnetic behavior between the HfFe(6)Ge(6)-type and YCo(6)Ge(6)-type structures.
Main Methods:
- X-ray diffraction or similar crystallographic techniques to determine the crystal structures.
- Magnetic susceptibility measurements and/or neutron diffraction to probe magnetic ordering and spin orientations.
- Temperature-dependent measurements to observe magnetic transitions and spin reorientation phenomena.
Main Results:
- The iron (Fe) sublattice in both HfFe(6)Ge(6)-type and YCo(6)Ge(6)-type structures orders antiferromagnetically at a high transition temperature of 485(2) K.
- The Ytterbium (Yb) sublattice does not exhibit magnetic ordering down to 1.5 K.
- In the HfFe(6)Ge(6)-type structure, Fe magnetic moments reorient away from the crystallographic c-axis around 60 K upon cooling.
- In contrast, Fe magnetic moments in the YCo(6)Ge(6)-type structure remain aligned along or close to the c-axis at low temperatures.
Conclusions:
- YbFe(6)Ge(6) displays distinct magnetic anisotropy and spin reorientation behaviors dependent on its specific hexagonal crystal structure.
- The structural differences between the HfFe(6)Ge(6)-type and YCo(6)Ge(6)-type phases significantly influence the magnetic moment orientation of the Fe sublattice.
- These findings highlight the sensitivity of magnetic properties to subtle structural variations in intermetallic compounds.
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