𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Magnetic properties of Ni-Mn-Ga Heusler alloy films

✍ Scribed by J. Dubowik; I. Gościańska; Y. V. Kudryavtsev; Y. P. Lee; P. Sovák; M. Konĉ

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
188 KB
Volume
3
Category
Article
ISSN
1862-6351

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The films with composition Ni~x~ Mn~y~ Ga~z~ (x = 50 ± 5, y = 25 ± 5, z = 25 ± 5) were deposited by flash‐evaporation or sputtering on mica and glass substrates and annealed in a high vacuum at 673–973 K. X‐ray diffraction at room temperature reveals the presence of B2 (or L2~1~) type of structure depending on annealing conditions. Magnetic properties were studied by ferromagnetic resonance at temperatures from 78 K to 400 K and compared with electric resistivity data. It is shown that the magnetic properties of the films critically depend on their structural ordering and microstructure. The films annealed at T < 800 K reveal a complex magnetic behavior due to their specific microstructure while those annealed at T > 800 K show magnetic properties comparable with those of bulk Ni‐Mn‐Ga alloys. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

📜 SIMILAR VOLUMES

Structure dependence of optical spectra
Structure dependence of optical spectra of ferromagnetic Heusler alloy Ni–Mn–Ga
✍ J.F. Wan; J.N. Wang 📂 Article 📅 2005 🏛 Elsevier Science 🌐 English ⚖ 239 KB

The influence of structural transformation on the optical properties of Heusler alloy Ni-Mn-Ga has been investigated by using Density Functional Theory code CASTEP. The calculated optical refractive and absorption spectra, the off-diagonal components of the dielectric function and the optical conduc

Atomic ordering and magnetic properties
Atomic ordering and magnetic properties in Ni2Mn(GaxAl1−x) Heusler alloys
✍ H. Ishikawa; R.Y. Umetsu; K. Kobayashi; A. Fujita; R. Kainuma; K. Ishida 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 539 KB

The phase stability and magnetic properties of Ni 2 Mn(Ga x Al 1Àx ) alloys were studied by differential scanning calorimetric and magnetometric measurements, and X-ray diffraction and transmission electronic microscopic observations. The order-disorder transition temperature from the B2 to the L2 1

Lattice dynamics of Ni–Mn–Al Heusler all
Lattice dynamics of Ni–Mn–Al Heusler alloys
✍ X. Moya; Ll. Mañosa; A. Planes; T. Krenke; M. Acet; E.F. Wassermann; M. Morin; V 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 140 KB

We have studied the lattice dynamics of a Ni 54 Mn 23 Al 23 (at.%) Heusler single-crystalline alloy by means of neutron scattering and ultrasonic techniques. Results show the existence of a number of precursor phenomena. We have found an anomaly (dip) in the low TA 2 phonon branch at the wave number