Affiliation:
1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education) and School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
2. State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, CAS, Beijing 100190, China
Abstract
In Dy2In1-xAlx (x = 0, 0.2, 0.3 and 0.4) alloys, the hexagonal structure is gradually transformed into orthorhombic one with x = 0.3 as the critical composition. In Dy2In0.7Al0.3 alloy, the highest magnetic entropy change is accompanied with highest saturation magnetostriction ∼995 ppm under 7 T near phase transition temperature, indicating the typical strong magnetoelastic coupling. From heat-capacity ( C p) measurement, a sharp peak is observed on the C p - T curves for Dy2In1-xAlx (x = 0, 0.2 and 0.3) alloys. Meanwhile, more Al substitution for In leads into the reduced density of state near Fermi level of each alloy judged from C p /T - T2 curves. The maximized ΔTad for a field of 7 T is slightly increased from 6.5 K in Dy2In to 7 K in Dy2In0.7Al0.3.
Funder
National Natural Science Foundation of China
Beijin Municipal Natural Science Foundation
Fundamental Research Funds for the Central Universities
The Open Fundings of the Key Laboratory of Solidification Processing in NWPU
State Key Laboratory of Advanced Metals and Materials
State Key Laboratory for Mechanical Behavior of Materials
The Joint Funding Between Shenyang National Laboratory for Materials Science and State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals
Liaoning Revitalization Talents Program
Subject
General Physics and Astronomy