Temporal evolution of spin-polarization in ferromagnetic tunnel junctions
The spin polarization of the simple transition-metal ferromagnets Fe, Co, and Ni can be measured using ferromagnet/insulator/superconductor tunneling structures. Measurements, carried out over the pas...
The spin polarization of the simple transition-metal ferromagnets Fe, Co, and Ni can be measured using ferromagnet/insulator/superconductor tunneling structures. Measurements, carried out over the pas...
Reduced coercivity in ferromagnetic Co–Cu coevaporated epitaxial films on Cu(111)
Epitaxial films grown by coevaporation of Co and Cu on Cu(111) were investigated by low-energy electron diffraction and surface magneto-optical Kerr-effect measurements. The films are dominantly face-...
Epitaxial films grown by coevaporation of Co and Cu on Cu(111) were investigated by low-energy electron diffraction and surface magneto-optical Kerr-effect measurements. The films are dominantly face-...
6% magnetic-field-induced strain by twin-boundary motion in ferromagnetic Ni–Mn–Ga
Appl. Phys. Lett. 77, 886 (2000); doi:10.1063/1.1306635
Issue Date: 7 August 2000
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Field-induced strains of 6% are reported in ferromagnetic Ni–Mn–Ga martensites at room temperature. The strains are the result of twin boundary motion driven largely by the Zeeman energy difference across the twin boundary. The strain measured parallel to the applied magnetic field is negative in the sample/field geometry used here. The strain saturates in fields of order 400 kA/m and is blocked by a compressive stress of order 2 MPa applied orthogonal to the magnetic field. The strain versus field curves exhibit appreciable hysteresis associated with the motion of the twin boundaries. A simple model accounts quantitatively for the dependence of strain on magnetic field and external stress using as input parameters only measured quantities. ©2000 American Institute of Physics.
| History: | Received 18 April 2000; accepted 9 June 2000 |
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BibSonomy
KEYWORDS and PACS
NICKEL ALLOYS,
MANGANESE ALLOYS,
GALLIUM ALLOYS,
TWINNING,
STRAINS,
MAGNETIC FIELDS,
FERROMAGNETIC MATERIALS,
HYSTERESIS,
magnetostriction,
magnetoelastic effects,
twin boundaries,
shape memory effects,
stress-strain relations
- 75.80.+q
Magnetic properties and materials Magnetomechanical and magnetoelectric effects, magnetostriction - 75.50.Cc
Magnetic properties and materials Studies of specific magnetic materials Other ferromagnetic metals and alloys - 61.72.Mm
Structure of solids and liquids; crystallography Defects and impurities in crystals; microstructure Grain and twin boundaries - 81.40.Jj
Materials science Treatment of materials and its effects on microstructure and properties Elasticity and anelasticity, stress-strain relations - YEAR: 2000
PUBLICATION DATA
0003-6951 (print)
1077-3118 (online)
AIP
REFERENCES (14)
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