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Published on: August 15, 2018
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Magnetic order of Nd5Pb3 single crystals
1Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States of America.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 15, 2018
Summary
We grew millimeter-sized Nd5Pb3 single crystals and observed two magnetic orders at 44K and 8K. Our study suggests this material could be a playground for studying magnetic electrides.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Neodymium-lead (Nd5Pb3) compounds are explored for their unique magnetic properties.
- Understanding the interplay between magnetic order and electronic structure is crucial for novel material development.
Purpose of the Study:
- To experimentally investigate the magnetic ordering and electronic properties of Nd5Pb3 single crystals.
- To explore the influence of high pressure on the magnetic phase transitions.
- To theoretically examine the electronic structure and its relation to potential electride behavior.
Main Methods:
- Single crystal growth using a Nd-Co flux.
- Anisotropic magnetic property measurements.
- Electrical resistivity measurements under hydrostatic pressures up to 8 GPa.
- Specific heat measurements.
- Neutron single crystal diffraction.
- First-principles band structure calculations.
Main Results:
- Two successive magnetic orders were observed at TN1 = 44 K and TN2 = 8 K.
- Magnetic structures involve ferromagnetic stripes coupled antiferromagnetically, with ordered moments along the c-axis.
- Magnetic transitions show distinct anomalies in electrical resistivity and specific heat.
- Resistivity measurements under pressure suggest a phase transition around 6 GPa.
- Band structure calculations indicate similarity to known one-dimensional electrides.
Conclusions:
- Nd5Pb3 exhibits complex successive magnetic ordering.
- The material shows potential as a platform for studying magnetic electrides.
- Further experimental verification of anionic electrons is warranted.
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