Related Experiment Video
Updated: Jul 18, 2025
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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TbMgNi4-Co-(H,D)2 System. II: Correlation between Structural and Magnetic Properties
Valérie Paul-Boncour1, Premysl Beran2,3, Charles Hervoches2
1Université Paris-Est Créteil, CNRS, ICMPE, UMR 7182, F-94320 Thiais, France.
ACS Omega
|August 28, 2023
Summary
The magnetic properties of TbMgNi4-Co compounds were investigated. Curie temperature (TC) increases with cobalt content but decreases with hydrogen/deuterium insertion, revealing complex magnetic ordering.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- TbMgNi4-Co intermetallic compounds exhibit complex magnetic behaviors.
- Understanding their magnetic properties is crucial for potential applications.
Purpose of the Study:
- To investigate the magnetic properties of TbMgNi4-Co intermetallic compounds and their hydrides/deuterides.
- To elucidate the effect of cobalt content and hydrogen/deuterium insertion on magnetic ordering.
Main Methods:
- Magnetic measurements
- In situ X-ray and neutron powder diffraction
- Temperature-dependent X-ray diffraction
Main Results:
- Compounds crystallize in a SnMgCu4-type structure.
- Curie temperature (TC) increases exponentially with cobalt content.
- Hydrogen/deuterium insertion significantly decreases TC.
- Cell volume minima observed at TC.
- Slightly canted ferrimagnetic structure identified for x = 2 and 3.
- Reduced Tb magnetic moments and refined average Ni/Co moments observed.
Conclusions:
- Cobalt ordering influences magnetic properties.
- Hydrogen/deuterium insertion disrupts magnetic ordering.
- Crystal field effects contribute to reduced Tb moments.
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