Tuning the Ground State and Its Relationship to Zero-Field-Cooled Exchange Bias in NiMnSnAl Alloys

Journal Article · Tue Oct 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5069-5· OSTI ID:22919529

Lu, N. L. ^[1]; Li, Y. ^[2]; Wang, H. B. ^[1]; Zhang, C. L. ^[3]; Fang, Y.; Zhang, L.; Jiang, X. F. ^[2]

---

1. China University of Mining and Technology, School of Materials Science and Engineering (China)
2. Changshu Institute of Technology, Jiangsu Laboratory of Advanced Functional Materials, Department of Physics (China)
3. Jiangnan University, School of Science (China)

The crystal structure, phase transitions, and exchange bias (EB) in Al-doped Ni{sub 50}Mn{sub 36}Sn{sub 14-x}Al{sub x} Heusler alloys were investigated. With the increase of Al content, the cell volume decreases gradually, and the martensitic transformation temperature shifts to a higher temperature. Due to the positive “chemical pressure” by Al substitution, the antiferromagnetic interaction strengthens, leading to the decrease of magnetization and the ground state evolution from “reentrant” spin glass to spin glass. Zero-field-cooled EB is triggered in samples exhibiting spin-glass ground state. These results suggest a viable way to design Ni-Mn-Z-based alloys showing zero-field-cooled EB by tuning the exchange interactions and ground state via lattice modulation.

• OSTI ID: 22919529
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 10 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ANTIFERROMAGNETISM
CRYSTAL STRUCTURE
DOPED MATERIALS
EXCHANGE INTERACTIONS
GROUND STATES
HEUSLER ALLOYS
MAGNETIZATION
MANGANESE COMPOUNDS
NICKEL COMPOUNDS
PHASE TRANSFORMATIONS
QUATERNARY ALLOY SYSTEMS
SPIN GLASS STATE
TIN COMPOUNDS