Epitaxial Fe16N2 films grown by sputtering

Ortíz, C.; Dumpich, G.; Morrish, A. H.

doi:10.1063/1.112552

Cited by 72 publications

(23 citation statements)

References 14 publications

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“…There is a number of studies on sputter-deposited FeN thin films, which report saturation magnetisations beyond Slater-Pauling for the a 00 Fe 16 N 2 phase in a mix of different FeN phases, [278][279][280][281][282][283][284][285][286] but often with large uncertainties and always lower than for the MBE-grown pure a 00 phase. The fact that different groups-applying what seems to be a near-identical sputtering fabrication routine-reported such different results of the magnetic properties, in the range of 2.1 T < l 0 M S < 2.8 T, raised considerable doubts regarding data reliability within the magnetism community.…”

Section: E Fenmentioning

confidence: 99%

A review of high magnetic moment thin films for microscale and nanotechnology applications

et al. 2016

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The creation of large magnetic fields is a necessary component in many technologies, ranging from magnetic resonance imaging, electric motors and generators, and magnetic hard disk drives in information storage. This is typically done by inserting a ferromagnetic pole piece with a large magnetisation density M S in a solenoid. In addition to large M S , it is usually required or desired that the ferromagnet is magnetically soft and has a Curie temperature well above the operating temperature of the device. A variety of ferromagnetic materials are currently in use, ranging from FeCo alloys in, for example, hard disk drives, to rare earth metals operating at cryogenic temperatures in superconducting solenoids. These latter can exceed the limit on M S for transition metal alloys given by the Slater-Pauling curve. This article reviews different materials and concepts in use or proposed for technological applications that require a large M S , with an emphasis on nanoscale material systems, such as thin and ultra-thin films. Attention is also paid to other requirements or properties, such as the Curie temperature and magnetic softness. In a final summary, we evaluate the actual applicability of the discussed materials for use as pole tips in electromagnets, in particular, in nanoscale magnetic hard disk drive read-write heads; the technological advancement of the latter has been a very strong driving force in the development of the field of nanomagnetism.

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Section: E Fenmentioning

confidence: 99%

A review of high magnetic moment thin films for microscale and nanotechnology applications

et al. 2016

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“…Great improvements in yield www.zaac.wiley-vch.de of αЈЈ-phase were achieved producing thin films with different techniques like evaporation-deposition, [11,[36][37][38][39] ion implantation, [40][41][42] molecular beam epitaxy, [43][44][45][46][47] and sputtering methods. [46,[48][49][50][51][52][53][54] The synthesis of bulk αЈЈ-Fe 16 N 2 in single phase is more difficult. [55] Various ways to generate nitrogen austenite and martensite were applied by different groups.…”

Section: αјј-Fe 16 Nmentioning

confidence: 99%

Formation and Decomposition of Metastable α′′‐Fe₁₆N₂ from in situ Powder Neutron Diffraction and Thermal Analysis

Widenmeyer

Hansen

Niewa

2013

Zeitschrift anorg allge chemie

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Abstract. In order to gain more information on the formation and decomposition behavior of metastable αЈЈ-Fe 16 N 2 from different starting materials in situ neutron diffraction and thermal analysis in different gas atmospheres and heating rates were carried out. Under inert conditions a direct conversion of αЈЈ-Fe 16 N 2 in α-Fe and N 2 was observed using higher heating rates, while with lower heating rates the decomposition occurs via the formation of γЈ-Fe 4 N y . The changes in c/a ratio of the αЈЈ-phase are related to a subsequent transformation into martensitic αЈ-Fe 8 N during the decomposition. In situ neutron diffraction data were collected in high quality, due to an optimized experi-

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“…Ortiz et al 6 claimed success in epitaxially growing singlecrystal ␣Љ-Fe 16 N 2 films on single-crystal MgO substrates by reactive sputtering. But the average magnetic moment of their material was only 250 emu/g ͑1853 emu/cc͒.…”

Section: Introductionmentioning

confidence: 99%

Fe–N gradient films and epitaxial Fe16N2 single-crystal films

Tian

Jiang

Sun

1997

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Fe–N gradient films and epitaxial Fe16N2 single-crystal films were prepared with a facing-target sputtering system. The Rutherford backscattering spectrum, x-ray diffraction, and selected area electron diffraction indicate that the gradient films possess some composition and structure gradient. The α′′-Fe16N2, γ-Fe4N, ε-FexN(2<x⩽3), and ζ−Fe2N phases are present in the gradient films at different depths. The α′′-Fe16N2 single-crystal films correspond to a deformed body-centered tetragonal structure with parameters of a=b=5.72 Å and c=6.29 Å. They grew epitaxially on a NaCl(100) substrate with an orientation relationship of α′′-Fe16N2(001)∥NaCl(001) and α′′-Fe16N2[100]∥NaCl[100]. Perfect electron diffraction patterns with perfect symmetry in the [1̄11], [011], and [001] directions can be observed distinctly by a rotational double tilting sample stand. By controlling N2 partial pressure, substrate temperature, and crystal orientation, α′′-Fe16N2 single-crystal films can be successfully grown epitaxially.

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Epitaxial Fe16N2 films grown by sputtering

Cited by 72 publications

References 14 publications

A review of high magnetic moment thin films for microscale and nanotechnology applications

A review of high magnetic moment thin films for microscale and nanotechnology applications

Formation and Decomposition of Metastable α′′‐Fe₁₆N₂ from in situ Powder Neutron Diffraction and Thermal Analysis

Fe–N gradient films and epitaxial Fe16N2 single-crystal films

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Epitaxial Fe16N2 films grown by sputtering

Cited by 72 publications

References 14 publications

A review of high magnetic moment thin films for microscale and nanotechnology applications

A review of high magnetic moment thin films for microscale and nanotechnology applications

Formation and Decomposition of Metastable α′′‐Fe16N2 from in situ Powder Neutron Diffraction and Thermal Analysis

Fe–N gradient films and epitaxial Fe16N2 single-crystal films

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Formation and Decomposition of Metastable α′′‐Fe₁₆N₂ from in situ Powder Neutron Diffraction and Thermal Analysis