The Phase Transformation and Magnetic Properties in Ni-Mn-In Alloys

2013 ◽  
Vol 712-715 ◽  
pp. 54-57 ◽  
Author(s):  
Hai Le Yan ◽  
Zong Bin Li ◽  
Chun Yang Zhang ◽  
Yu Dong Zhang ◽  
Claude Esling ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Transformation ◽  
Structural Transition ◽  
Alloy Composition ◽  
Ferromagnetic Shape Memory Alloys ◽  
Scanning Calorimetry ◽  
Phase Transition Temperatures ◽  
Ferromagnetic Shape Memory ◽  
Curie Temperatures ◽  
Magnetization Change

The phase transformation and magnetic properties of Heusler-type Ni50Mn50-xInx(x=10~16) ferromagnetic shape-memory alloys have been systemically investigated by differential scanning calorimetry and vibrating sample magnetometry. It is found that the phase transition temperatures show a linear relationship with the In concentration and the curie temperatures of austenite phases are not sensitive to the alloy composition. The existence of large magnetization change during the magneto-structural transition is the origin of magnetic-field-induced transformation effect.

Magnetic properties of ferromagnetic shape memory alloys Ni _{2-x} Cu _{x} MnGa

2005 ◽  
Vol 21 (3-4) ◽  
pp. 151-157 ◽  
Author(s):  
Takeshi Kanomata ◽  
Takuji Nozawa ◽  
Daisuke Kikuchi ◽  
Hironori Nishihara ◽  
Keiichi Koyama ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Ferromagnetic Shape Memory Alloys ◽  
Ferromagnetic Shape Memory

On the stress-assisted magnetic-field-induced phase transformation in Ni2MnGa ferromagnetic shape memory alloys

2007 ◽  
Vol 55 (13) ◽  
pp. 4253-4269 ◽  
Author(s):  
H.E. Karaca ◽  
I. Karaman ◽  
B. Basaran ◽  
D.C. Lagoudas ◽  
Y.I. Chumlyakov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Ferromagnetic Shape Memory Alloys ◽  
Ferromagnetic Shape Memory

Phase Transformation and Microstructures in Ni and Cu Base Ferromagnetic Shape Memory Alloys

2007 ◽  
Vol 539-543 ◽  
pp. 3157-3162 ◽  
Author(s):  
Takuro Kushima ◽  
Koichi Tsuchiya ◽  
Yasuyoshi Sho ◽  
Takafumi Yamada ◽  
Yoshikazu Todaka ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Magnetic Property ◽  
Chemical Composition ◽  
Martensitic Transformation ◽  
Curie Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ferromagnetic Shape Memory Alloys ◽  
Ferromagnetic Shape Memory

Effect of chemical composition was investigated on martensitic transformation temperatures, Curie temperature, magnetization and microstructures for Ni-(Mn, Fe, Co)-Ga and Cu-Mn-Ga systems. In the Ni-(Mn, Fe, Co)-Ga alloys, which is a modification of Ni-Mn-Ga systems, the Af and TC over 400 K were achieved. Cu-Mn-Ga alloy exhibited shape memory effect at temperatures above 373 K and had TC over 400 K. Furthermore, Cu-Mn-Ga exhibits good ductility even in polycrystalline condition unlike the case of Ni-Mn-Ga. Effect of addition of the fourth element to improve the magnetic property is under investigation.

Influence of The Alloy Composition on The Magnetic Properties of Nanocrystalline Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo)

1999 ◽  
Vol 577 ◽  
Author(s):  
M. Kopcewicz ◽  
A. Grabias ◽  
B. Idzikowski
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperature ◽  
Alloy Composition ◽  
Anisotropy Field ◽  
Nanocrystalline Phase ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Scanning Calorimetry ◽  
Rf Magnetic Field ◽  
Collapse Effect

ABSTRACTFormation of the nanocrystalline bcc Fe phase due to thermal treatment of the amorphous Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo) precursors is studied by the Mössbauer and differential scanning calorimetry techniques. The dependence of the formation of the bcc Fe phase on the alloy composition is discussed. In order to determine the optimal soft magnetic properties of these nanocrystalline alloys the rf-Mössbauer technique is used in which rf collapse effect induced by a radio-frequency (rf) magnetic field is employed. It was found that anisotropy fields in the nanocrystalline phase were smaller in Nb- and Mo-containing alloys as compared to the alloys which contain Ti or Ta. Variations of the anisotropy field vs. alloy composition and annealing temperature are discussed in detail.

Characterization of Martensitic Transformation in Ferromagnetic Shape Memory Alloys Co-Ni-Ga Melt-Spun Ribbons

2005 ◽  
Vol 475-479 ◽  
pp. 2033-2036 ◽  
Author(s):  
F.B. Meng ◽  
Yang Xian Li ◽  
H.Y. Liu ◽  
J.P. Qu ◽  
M. Zhang ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Structural Transition ◽  
Magnetic Measurements ◽  
The Body ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Diffraction Intensity ◽  
Ferromagnetic Shape Memory Alloys ◽  
Ferromagnetic Shape Memory

The martensitic transformation in Co50Ni20Ga30 ribbon has been characterized in detail by means of X-ray diffraction and magnetic measurements. The sample showed a structural transition from the body-centered cubic with indexed lattice parameters of a=5.743 Å to martensite with a tetragonal structure with lattice parameters of a=b=5.422 Å and c=6.401 Å. (c/a>1). By comparing the results of the diffraction intensity and the magnetic susceptibility measurements, we found that the proceeding of the martensitic transformation can be divided into several different steps during cooling from 283 K to 213 K. During heating from 673 K to 833 K, the peak width became very wide and the intensity became very low. It reveals an order-disorder transformation.

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