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Ferromagnetism in ZrFe12−x Al x and HfFe12−x Al x (x = 6.0, 6.5, 7.0)
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10.1063/1.4712445
/content/aip/journal/jap/111/9/10.1063/1.4712445
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/9/10.1063/1.4712445

Figures

Image of FIG. 1.
FIG. 1.

Backscattered electron SEM images of arcmelted samples. All images are at the same scale. Lighter regions are richer in Zr/Hf and darker regions contain a lower concentration of these elements.

Image of FIG. 2.
FIG. 2.

Magnetic properties of arcmelted ZrFe12−x Al x (a, c, e) and HfFe12−x Al x (b, d, f). Temperature dependent measurements were made upon cooling. M–H curves were measured upon decreasing the magnetic field H.

Image of FIG. 3.
FIG. 3.

Electrical resistivity (ρ) and heat capacity (c P ) of ZrFe5Al7 and HfFe5Al7 showing an anomaly in c P and a slope change in the ρ at the Curie temperature for both materials.

Image of FIG. 4.
FIG. 4.

Magnetic properties of annealed ZrFe12−x Al x (a, c) and HfFe12−x Al x (b, d, f), after heating at 800 °C for 1 week. Temperature dependent measurements were made upon cooling. M–H curves were measured upon decreasing the magnetic field H.

Image of FIG. 5.
FIG. 5.

Electronic density of states and projections onto the LAPW spheres for (a) ZrFe6Al6 and (b) HfFe6Al6. The majority (minority) spin contributions are shown above (below) zero. The Fermi level is at E = 0.

Tables

Generic image for table
Table I.

Results of Rietveld refinement of powder x-ray diffraction data at room temperature in the ThMn12 structure type, including lattice constants, x-coordinates of the M1 and M2 sites.

Generic image for table
Table II.

Compositions determined by refinement of the Fe/Al content of the M1 site, and those estimated from EDS measurements.

Generic image for table
Table III.

Summary of measured magnetic properties of ZrFe12−x Al x and HfFe12 − x Al x , including Curie temperature (T C ), magnetization (M) at T = 2 K and H = 6 T, and remanent magnetization (M r ) at T = 2 K.

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/content/aip/journal/jap/111/9/10.1063/1.4712445
2012-05-10
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ferromagnetism in ZrFe12−xAlx and HfFe12−xAlx (x = 6.0, 6.5, 7.0)
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/9/10.1063/1.4712445
10.1063/1.4712445
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