Energy harvesting using martensite variant reorientation mechanism in a NiMnGa magnetic shape memory alloy

Journal Article · Mon Apr 23 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2721143· OSTI ID:20971878

Karaman, I; Basaran, B; Karaca, H E; Karsilayan, A I; Chumlyakov, Y I ^[1]

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1. Department of Mechanical Engineering, Texas A and M University, College Station, Texas 77843 (United States)

Magnetic shape memory alloys demonstrate significant potential for harvesting waste mechanical energy utilizing the Villari effect. In this study, a few milliwatts of power output are achieved taking advantage of martensite variant reorientation mechanism in Ni{sub 51.1}Mn{sub 24}Ga{sub 24.9} single crystals under slowly fluctuating loads (10 Hz) without optimization in the power conversion unit. Effects of applied strain range, bias magnetic field, and loading frequency on the voltage output are revealed. Anticipated power outputs under moderate frequencies are predicted showing that the power outputs higher than 1 W are feasible.

• OSTI ID: 20971878
• Journal Information: Applied Physics Letters, Vol. 90, Issue 17; Other Information: DOI: 10.1063/1.2721143; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIRECT ENERGY CONVERSION
ELECTRIC POTENTIAL
GALLIUM ALLOYS
MAGNETIC FIELDS
MANGANESE ALLOYS
MARTENSITE
MONOCRYSTALS
NICKEL ALLOYS
OPTIMIZATION
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT