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Magnetism and electron transport of MnyGa (1 < y < 2) nanostructures
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10.1063/1.4812561
/content/aip/journal/jap/114/1/10.1063/1.4812561
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812561

Figures

Image of FIG. 1.
FIG. 1.

(a) Room-temperature x-ray diffraction patterns of MnGa, MnGa, and MnGa ribbons which are indexed to the tetragonal 1 structure. The inset shows an XRD pattern of MnGa ribbon indexed to the tetragonal 0 structure. (b) A simulated powder x-ray diffraction pattern (Rietveld plot) corresponding to the tetragonal-1 structure of MnGa alloy with the experimental data (red line). The difference between the data and the fit is shown in blue color. The inset plots the lattice parameters and obtained from the Rietveld analysis of the XRD data as a function of y in MnGa (y = 1.2, 1.4, and 1.6) alloy. (c) 1-MnGa unit cell.

Image of FIG. 2.
FIG. 2.

TEM dark field image (left panel) and high resolution image (right panel) of a specimen prepared from the MnGa ribbon.

Image of FIG. 3.
FIG. 3.

(a) Room temperature magnetization as a function of magnetic field M(H) of MnGa (y = 1.2, 1.4, 1.6, and 1.9) ribbons. Inset shows the M(H) hysteresis loop of a magnetic field aligned powder prepared from the MnGa ribbon. (b) Magnetic anisotropy constant as a function of y in MnGa. The inset of Fig. 3(b) shows how the high-field (H = 70 kOe) magnetization and coercivity change as the manganese concentration in MnGa alloy changes.

Image of FIG. 4.
FIG. 4.

Normalized magnetization (M/M) as a function of temperature of MnGa (y = 1.2, 1.4, 1.6, and 1.9) ribbons measured at H = 1 kOe during heating from room temperature to 800 K. The inset plots the Curie temperature as a function of y.

Image of FIG. 5.
FIG. 5.

Relative resistance (R/R) as a function of temperature of MnGa (y = 1.2, 1.4, 1.6, and 1.9) ribbons. Inset shows the expanded view of the low-temperature (between 2 K and 25 K) R(T) curve of MnGa ribbon.

Tables

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Table I.

Lattice parameters of MnGa alloys.

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/content/aip/journal/jap/114/1/10.1063/1.4812561
2013-07-01
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetism and electron transport of MnyGa (1 < y < 2) nanostructures
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812561
10.1063/1.4812561
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