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Unconventional metallic magnetism in LaCrSb3
E Granado1, H Martinho, M S Sercheli
1NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Physical Review Letters
|September 13, 2002
Summary
Neutron diffraction reveals LaCrSb3 exhibits both ferromagnetic and antiferromagnetic properties below 126 K, with a spin reorientation around 95 K. This suggests a complex interplay of localized and itinerant electron spins in the material.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- LaCrSb3 is an intermetallic compound with potential magnetic properties.
- Understanding magnetic ordering in materials is crucial for developing new electronic devices.
Purpose of the Study:
- To investigate the magnetic structure and phase transitions in LaCrSb3.
- To determine the nature of magnetic ordering and spin interactions.
Main Methods:
- Neutron diffraction measurements were performed on LaCrSb3.
- Specific heat measurements were conducted to identify phase transitions.
Main Results:
- A coexistence of ferromagnetic and antiferromagnetic sublattices was observed below the Curie temperature (T(C)) of 126 K.
- Ordered magnetic moments were quantified at 1.65(4) μB/formula unit for ferromagnetic and 0.49(4) μB/formula unit for antiferromagnetic components at 10 K.
- A spin-reorientation transition occurred around 95 K.
- No distinct anomaly was detected in specific heat measurements at T(C).
Conclusions:
- The magnetic behavior of LaCrSb3 is characterized by coexisting ferromagnetic and antiferromagnetic ordering.
- The absence of a specific heat anomaly at T(C) suggests a complex magnetic transition.
- The results indicate the presence of both localized and itinerant electron spins contributing to the magnetism.
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