Magnetostriction of ternary Fe–Ga–X alloys (X = Ni,Mo,Sn,Al)
Investigations were made into the effect of small additions of Ni, Mo, Sn, as well as larger additions of Al on the magnetostriction of single crystal Fe100–xGax alloys (x13). The Fe–Ga and ...
Investigations were made into the effect of small additions of Ni, Mo, Sn, as well as larger additions of Al on the magnetostriction of single crystal Fe100–xGax alloys (x13). The Fe–Ga and ...
Magnetoelastic surface acoustic wave attenuation and anisotropic magnetoresistance in Ni3Fe thin films
The vector magnetic field, H, dependencies of 0.6 GHz magnetoelastic Rayleigh-mode surface acoustic wave (SAW) attenuation, A(H), and dc magnetoresistance of polycrystalline Ni3Fe thin films with thic...
The vector magnetic field, H, dependencies of 0.6 GHz magnetoelastic Rayleigh-mode surface acoustic wave (SAW) attenuation, A(H), and dc magnetoresistance of polycrystalline Ni3Fe thin films with thic...
Temperature dependence of magnetic anisotropy in Ni–Mn–Ga alloys exhibiting giant field-induced strain
J. Appl. Phys. 91, 8228 (2002); doi:10.1063/1.1453944
Issue Date: 15 May 2002
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Temperature dependence of structure and magnetic anisotropy of single crystalline Ni48.8Mn28.6Ga22.6 alloy exhibiting giant field-induced strain or magnetic shape memory (MSM) effect was studied in the temperature range 80–420 K. Upon cooling the alloy transforms from cubic austenite at 307 K to the martensite which exhibits five-layered (modulated) tetragonal structure (5M) with a = 0.595 nm and c = 0.559 nm. Reverse transformation occurs at 317 K. An additional intermartensitic transition takes place at about 95 K. The basic mechanism of the MSM effect was corroborated by direct simultaneous measurements of strain and magnetization as a function of magnetic field. The magnetic anisotropy of the martensite exhibiting the giant strain was determined from the magnetization curves measured by a vibrating sample magnetometer at different temperatures. The anisotropy of the single variant 5M martensite is uniaxial with easy axis along the tetragonal c axis. The first magnetic anisotropy constant is Ku1 = 2.0×105 J/m3 at 283 K and increase to Ku1 = 2.65×105 J/m3 at 130 K. Above room temperature the anisotropy steeply decreases. The second anisotropy constant is negligible and less than 4% of the first anisotropy constant. ©2002 American Institute of Physics.
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KEYWORDS and PACS
nickel alloys,
manganese alloys,
gallium alloys,
magnetomechanical effects,
magnetic anisotropy,
martensitic transformations,
reverse martensitic transformations,
shape memory effects,
crystal structure,
magnetisation
- 75.30.Gw
Magnetic properties and materials Intrinsic properties of magnetically ordered materials Magnetic anisotropy - 75.80.+q
Magnetic properties and materials Magnetomechanical and magnetoelectric effects, magnetostriction - 81.05.Bx
Materials science Specific materials: fabrication, treatment, testing and analysis Metals, semimetals, and alloys - 64.70.Kb
Equations of state, phase equilibria, and phase transitions Specific phase transitions Solid–solid transitions - 81.30.Kf
Materials science Phase diagrams and microstructures developed by solidification and solid–solid phase transformations Martensitic transformations - 81.30.Hd
Materials science Phase diagrams and microstructures developed by solidification and solid–solid phase transformations Constant-composition solid–solid phase transformations: polymorphic, massive, and order–disorder - 62.20.Fe
Mechanical and acoustical properties of condensed matter Mechanical properties of solids Deformation and plasticity (including yield, ductility, and superplasticity) - 81.40.Lm
Materials science Treatment of materials and its effects on microstructure and properties Deformation, plasticity, and creep - 75.60.Ej
Magnetic properties and materials Domain effects, magnetization curves, and hysteresis Magnetization curves, hysteresis, Barkhausen and related effects - 61.66.Dk
Structure of solids and liquids; crystallography Structure of specific crystalline solids Alloys - YEAR: 2002
RELATED DATABASES
PUBLICATION DATA
0021-8979 (print)
1089-7550 (online)
AIP
REFERENCES (16)
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