1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Significant disorder-induced enhancement of the magnetization of Fe2CrGa by ball milling
Rent:
Rent this article for
USD
10.1063/1.4812380
/content/aip/journal/jap/114/1/10.1063/1.4812380
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812380

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of the (a) L21 and (b) HgCuTi structures and their calculated magnetic structures. The nearest (N)—neighbour relation between the AC and BD layers and the next-nearest (NN)—neighbour relation within these layers is indicated.

Image of FIG. 2.
FIG. 2.

Dependence of the lattice constant on the annealing temperature for ball-milled FeCrGa samples (A-samples). The inset shows the XRD patterns.

Image of FIG. 3.
FIG. 3.

Dependence of the Curie temperature on the annealing temperature for (a) A- and (b) B-samples. The insets show the vs curves.

Image of FIG. 4.
FIG. 4.

SAED patterns of (a) the A-sample annealed at 1073 K and (b) the B-sample annealed at 573 K with the electron beam parallel to the [100] and [110] directions, respectively.

Image of FIG. 5.
FIG. 5.

Saturation magnetization of A- and B-samples as a function of annealing temperature. The inset shows the vs curves at 5 K for the as-milled and the 1073/1473 K annealed B-samples. For comparison, the saturation moment of the arc-melted (not ball-milled) samples is also presented.

Image of FIG. 6.
FIG. 6.

Total energies and magnetic moments (stars) calculated by CPA as a function of degree of disorder in FeCrGa, (a) considering and (b) not considering magnetic interactions. The upper dashed areas represent the range of measured magnetic moments in the present work and the lower one is the range of moments reported in previous work. The energy increment of the vertical axis is 0.02 Ry/atom ≈ 0.272 eV/atom ≈ 26.2 kJ/mol of atoms.

Image of FIG. 7.
FIG. 7.

Atomic configurations and magnetic structures of (a) HgCuTi with (b) AD disorder, and (c) CD disorder.

Image of FIG. 8.
FIG. 8.

Atomic moments calculated upon increasing atomic disorder from the HgCuTi to the A2 structure. The dashed area represents the range of measured magnetic moments in the present work.

Tables

Generic image for table
Table I.

Total energies and magnetic moments calculated by CPA for some particular atomic configurations: L2, HgCuTi, A2 (100% disorder at four sites) and B2 (100% disorder at two sites). B2 stands for Cr/Ga disorder at B/D sites in the L2 structure, while B2 represents the Fe/Ga disorder at B/D sites in the HgCuTi structure. Due to the equivalence of the other B2-type states in L2 and HgCuTi, the states of B2, B2, B2, and B2 are all based on the disorder of HgCuTi.

Loading

Article metrics loading...

/content/aip/journal/jap/114/1/10.1063/1.4812380
2013-07-01
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Significant disorder-induced enhancement of the magnetization of Fe2CrGa by ball milling
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812380
10.1063/1.4812380
SEARCH_EXPAND_ITEM