Structural and Magnetic Properties of Nonequilibrium Disordered Fe-Al Alloys Produced by Facing Target Type DC Sputtering

Sumiyama, K.; Hirose, Yasuhiro; Nakamura, Yoji

doi:10.1143/jpsj.59.2963

Cited by 34 publications

(8 citation statements)

References 23 publications

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“…We assumed the Fe 1−x Al x alloys, which can be frozen during the production, to be responsible for the presence of low HF once Fe 1−x Al x with high x exhibit small magnetic moment. Additionally, these alloys behave cluster-like for x up to 0.5 [8]. Since the anomalies in the χ (T) curves show a characteristic shape of a cluster-like behavior [6], we have suggested that these anomalies can be related to Fe 1−x Al x alloys.…”

Section: Introductionmentioning

confidence: 78%

“…The temperature, T p , where the anomaly occurs, shifts to higher temperatures when the sample is submitted to a heat treatment [6,7]. It was also suggested that this anomaly can be related to the non-homogeneous transverse QR of the ribbon leading to the formation of multi-metastable phases [8,9]. In our previous work, we found that the Fe 57 Mössbauer spectra (MS), recorded on the as-cast samples indicate the existence of a hyperfine field distribution (HFD) corresponding to a low magnetic moment beside the higher HF allocated to the amorphous phase [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic properties and Mössbauer effect study of Nd60Fe30Al10 ribbons

Turtelli

Triyono

Wiesinger

et al. 2004

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Magnetic properties and Mössbauer effect study of Nd60Fe30Al10 ribbons

Turtelli

Triyono

Wiesinger

et al. 2004

Journal of Alloys and Compounds

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“…In the magnetic phase diagram of non-equilibrium Fe-Al alloy films, the ferromagnetic Curie temperature, T c , is lower than room temperature, and T c strongly depends on the alloy composition at around the equiatomic composition. 32) Therefore, the ferromagnetic behaviors observed in Fig. 7(b) is attributable to the compositional heterogeneity and presence of Fe-rich Fe-Al clusters in the Fe-Al alloy cluster assembly as shown in Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 84%

Morphology and Magnetic Properties of Fe and Al Nanocomposites Prepared with Single and Double-Glow-Discharge Sources

et al. 2008

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Fe and Al nanocomposites have been prepared using the plasma-gas-condensation cluster deposition system and investigated by transmission electron microscope and magnetization measurements. In Fe-Al alloy clusters assemblies prepared with the single glow discharge source there are bcc Fe-Al and B2-type ordered FeAl phases. In Fe/Al cluster composites prepared with double glow discharge sources, coreshell clusters are obtained: Fe cores are covered by Al and/or Al-oxide crystallites. In magnetization curves of the Fe-Al alloy cluster assembly and Fe/Al cluster composite, magnetic coercivity values are much smaller than that of an Fe cluster assembly. These results indicate that Fe-rich ferromagnetic Fe-Al phases exist in the Fe-Al alloy cluster assembly and Fe cores are covered and their magnetic coupling are weakened by Al and/or Al-oxide layers in the Fe/Al cluster composite.

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“…In bcc Fe x Al 1−x alloys, magnetic moments of Fe atoms decrease with the number of nearest neighbor Al atoms 24) and antiferromagnetically coupled with each other 25) , while vanish in the B2 type ordered phase where all Fe atoms are surrounded by Al atoms in their nearest neighbor sites. Since magnetic moments of Fe atoms are also suppressed with decreasing x in the amorphous and disordered phase 26) , the ferromagnetic state is stable only for x > 0.5 and the magnetic glass region extends down to x ≅ 0.3.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Electric and Magnetic Evolution in Sputter-Deposited FexSi1−x Alloy Films

et al. 2016

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Fe x Si 1−x alloy lms have been prepared by an rf sputter-deposition method. X-ray diffraction patterns indicate that an amorphous phase is formed for x < 0.8. Temperature dependence of electrical resistivity indicates the following electric evolution. Carrier-excitation from the impurity to the conduction (or valence) bands is dominant for x < 0.2 (the semiconductor regime), the band conduction is affected by strong impurity-and random-scatterings for x > 0.4 (the metallic regime), and the carrier-excitation between the impurity band and the mobility edge is retained due to the electron-localization effect in the amorphous structure for 0.2 < x < 0.4 (the transition region). The thermomagnetic-and magnetization-curves indicate the following magnetic evolution. The ferromagnetic phase appears at x ≅ 0.3 and the Curie temperature rapidly increases with increasing x. The magnetic (spin-or cluster-) glass region is very narrow (x = 0.3 ∼ 0.55) at low temperature. These magnetic behaviors are ascribed to the instability of Fe magnetic moments and the depression of RKKY interactions in the low x range.

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Structural and Magnetic Properties of Nonequilibrium Disordered Fe-Al Alloys Produced by Facing Target Type DC Sputtering

Cited by 34 publications

References 23 publications

Magnetic properties and Mössbauer effect study of Nd60Fe30Al10 ribbons

Magnetic properties and Mössbauer effect study of Nd60Fe30Al10 ribbons

Morphology and Magnetic Properties of Fe and Al Nanocomposites Prepared with Single and Double-Glow-Discharge Sources

Electric and Magnetic Evolution in Sputter-Deposited Fe<sub><i>x</i></sub>Si<sub>1−<i>x</i></sub> Alloy Films

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