Ion mass dependence of irradiation-induced local creation of ferromagnetism in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Al</mml:mtext></mml:mrow><mml:mrow><mml:mn>40</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>alloys

Faßbender, J.; Liedke, Maciej Oskar; Strache, Thomas; Möller, W.; Menéndez, Enric; Sort, Jordi; Rao, K. V.; Deevi, S.C.; Nogués, J.

doi:10.1103/physrevb.77.174430

Cited by 43 publications

(22 citation statements)

References 39 publications

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“…To determine whether it is possible to generate sub‐100‐nm structures by ion irradiation, focused ion beam (FIB) irradiation of Fe 60 Al 40 sheets was carried out. This approach takes advantage of the order–disorder transition that can occur in these alloys upon ion irradiation 41. Since ion–solid interactions can bring about atomic disordering (i.e., intermixing between Fe and Al atomic sites),42 the transition from the paramagnetic, chemically ordered, B2‐phase to the ferromagnetic, chemically disordered, A2‐phase in FeAl alloys can be accomplished, leading to the occurrence of ferromagnetic behavior.…”

Section: Resultsmentioning

confidence: 99%

Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys

Menéndez

Liedke

Faßbender

et al. 2009

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Sub-100-nm magnetic dots embedded in a non-magnetic matrix are controllably generated by selective ion irradiation of paramagnetic Fe(60)Al(40) (atomic %) alloys, taking advantage of the disorder-induced magnetism in this material. The process is demonstrated by sequential focused ion beam irradiation and by in-parallel broad-beam ion irradiation through lithographed masks. Due to the low fluences used, this method results in practically no alteration of the surface roughness. The dots exhibit a range of magnetic properties depending on the size and shape of the structures, with the smallest dots (<100 nm) having square hysteresis loops with coercivities in excess of micro(0)H(C) = 50 mT. Importantly, the patterning can be fully removed by annealing. The combination of properties induced by the direct magnetic patterning is appealing for a wide range of applications, such as patterned media, magnetic separators, or sensors.

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Section: Resultsmentioning

confidence: 99%

Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys

Menéndez

Liedke

Faßbender

et al. 2009

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“…Ion-induced magnetic modifications originate from structural modification of either the interface structure, the atomic short range order, the crystalline phase, the degree of chemical ordering, or the composition of the material. It has been shown that the Fe 60 Al 40 alloy is paramagnetic in a thermodynamically stable chemically ordered B2 phase while it is ferromagnetic in the metastable disordered A2 phase [5], [6]. Ion-irradiation is a useful tool to sensitively vary the chemical disorder in thin films.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Reversal of Disorder-Induced Ferromagnetic Regions in Fe<sub>60</sub>Al<sub>40</sub> Thin Films

et al. 2014

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Magnetization processes were investigated by employing magnetometry and magnetic domain imaging using magnetooptical longitudinal and polar effects in Fe 60 Al 40 films of 40 nm thickness. The films were initially chemically ordered and weakly ferromagnetic, and a large increase in the saturation magnetization was achieved through chemical disorder induced by Ne + -ion irradiation. Various sample geometries were investigated: 1) continuous film; 2) homogenously irradiated wire; and 3) magnetic stripe-patterned wire. Magnetization reversal and magnetic domains formed under the influence of the above sample geometries are reported.

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“…Among the intermetallic materials prepared using mechanical alloying process is the iron-aluminum (Fe 1−x Al x ) compound which has been largely studied in the last four decades due to their excellent functional properties, both magnetic [5,6] and structural [7]. This compound has been prepared by means of several techniques including, cold working procedures [8], mechanical alloying [9,10], and ion irradiation [11]. As it is known [12], in the Fe 1−x Al x compound, the room temperature ferromagnetic state of the atomically ordered alloy gradually disappears with increasing Al content, as expected from dilution models, up to x ≤ 0.2.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of Fe60Al40 alloys prepared by means of a magnetic mill

Bernal-Correa

Rosales‐Rivera

Pineda–Gómez

et al. 2010

Journal of Alloys and Compounds

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Ion mass dependence of irradiation-induced local creation of ferromagnetism inFe60Al40alloys

Cited by 43 publications

References 39 publications

Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys

Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys

Magnetization Reversal of Disorder-Induced Ferromagnetic Regions in Fe<sub>60</sub>Al<sub>40</sub> Thin Films

Structural and magnetic properties of Fe60Al40 alloys prepared by means of a magnetic mill

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