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Invar-like Behavior of Antiperovskite Mn3+xNi1–xN Compounds
- Source :
- Chemistry of Materials. 27:2495-2501
- Publication Year :
- 2015
- Publisher :
- American Chemical Society (ACS), 2015.
-
Abstract
- The antiperovskite Mn3+xNi1–xN compounds have been synthesized and characterized by a variety of experimental techniques. After Mn doping at the Ni site, both ferromagnetic characteristics and an Invar-like effect were observed in the antiferromagnetic host material. The observed Invar-like behavior was assumed to be related to the characteristic magnetic structure induced by the doping. Neutron diffraction results prove that the Mn doping stabilizes the special Γ5g antiferromagnetic phase with strong spin–lattice coupling that can be tuned to achieve Invar-like behavior. The magnetovolume effect (MVE) and significant correlation between spin and lattice were confirmed for the Γ5g magnetic phase by the first-principles calculations. Moreover, Mn 3d electrons were revealed to be the key factor for the MVE from the calculations. Our study presents a new mechanism for precisely controlling the zero thermal expansion of a single compound by achieving the special Γ5g magnetic phase of Mn atoms.
- Subjects :
- Materials science
Magnetic structure
Condensed matter physics
General Chemical Engineering
Doping
Neutron diffraction
General Chemistry
engineering.material
Thermal expansion
Antiperovskite
Ferromagnetism
Materials Chemistry
engineering
Antiferromagnetism
Condensed Matter::Strongly Correlated Electrons
Invar
Subjects
Details
- ISSN :
- 15205002 and 08974756
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Chemistry of Materials
- Accession number :
- edsair.doi...........54a9326e89a85022f5e0a3391a46c597