Epitaxial growth and magnetic properties of Fe16N2 films with high saturation magnetic flux density (invited)

Komuro, M.; Kozono, Y.; Hanazono, M.; Sugita, Y.

doi:10.1063/1.344689

Cited by 240 publications

(50 citation statements)

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“…2 Although these films did contain substantial amounts of ␣-Fe, high polarizations were attributed to the presence of the nitride phase. Recent experiments [3][4][5][6][7][8][9][10] related to measuring magnetic moments of iron in iron nitrides have raised various questions, both experimental and theoretical. Early evidence for unusually large moments associated with ␣Љ-Fe 16 N 2 came from Mössbauer studies of thin films and small particles.…”

Section: Introductionmentioning

confidence: 99%

Magnetic moment of iron in metallic environments

et al. 2000

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Rare-earth iron nitrides are emerging as an important class of magnetic materials. In certain rare-earth iron compounds, the insertion of small atoms such as nitrogen and boron has resulted in significant changes in the magnetic properties in the form of higher Curie temperatures, enhanced magnetic moments, and stronger anisotropies. In an attempt to understand some of the above, we have focused on two nitride phases of Fe, namely Fe 4 N ͑cubic͒ and Fe 16 N 2 ͑tetragonal͒. For the Fe 16 N 2 phase, the average Fe moment reported by different experimental groups varies over a wide range of values, from 2.3 B to 3.5 B . We will discuss some of the recent experiments and examine some related theoretical questions with regard to Fe having such an unusually large moment in a metallic environment. Employing a Hubbard-Stoner-like model in addition to local-density results, it is shown that an unusually large on-site Coulomb repulsion is necessary if one is to obtain a moment as large as 3.5 B .

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Section: Introductionmentioning

confidence: 99%

Magnetic moment of iron in metallic environments

et al. 2000

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“…In general, Fe x N y systems are interesting from an applied point of view due to the giant magnetic moments reported in the literature [4][5][6] and the presence of perpendicular magnetic anisotropy 7 found in the Fe 16 N 2 ͑␣Љ͒ system.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen incorporation effects in Fe(001) thin films

Menéndez¹,

Armelles²,

Cebollada³

et al. 2001

Journal of Applied Physics

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Nitrogen incorporates into Fe thin films during reactively sputtered TiN capping layer deposition. The influence that this nitrogen incorporation has both on the structure and magnetic properties is discussed for a series of Fe(001) thin films grown at different temperatures. A higher nitrogen content is accompanied by distortion in the Fe lattice and by reduction in the Fe magnetization saturation as well as in the effective anisotropy constant, K. The reduction of K brings as a consequence lowering in the coercive field with respect to equivalent Fe films with no nitrogen present.

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“…structure has received much attention as a candidate for rare-earth-free hard magnetic materials. After a surprising first report where the α"-Fe16N2 phase exhibited giant saturation magnetization as a thin film 1) , many researches have attempted to produce single phase α"-Fe16N2 2,3) . In 1993, a thin film method was established to achieve a relatively high volume fraction of α"-Fe16N2 using reactive sputtering, where a saturation magnetization of Ms ≃ 240 emu/g and uniaxial magnetocrystalline anisotropy constant of Ku ≃ 1×10 7 erg/cm 3 were determined 4) .…”

Section: Introductionmentioning

confidence: 99%