Neutron Diffraction Studies of the Compounds MnN and FeN

Suzuki, Kenji; Yamaguchi, Yasuo; Kaneko, T.; Yoshida, Hajime; Obi, Y.; Fujimori, H.; Morita, Hiroaki

doi:10.1143/jpsj.70.1084

Cited by 63 publications

(56 citation statements)

References 17 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[20] Furthermore, four metastable phases are reported in literature: bct αЈ-Fe 8 N, αЈЈ-Fe 16 N 2 as an order-variant thereof, [15,21] FeN in rock salt [22] and in sphalerite structure types. [23] Nitrogen austenite (γ-FeN z ) is only stable above 592°C. The iron atoms are arranged in an fcc lattice and the nitrogen atoms occupy octahedral interstitials (max.…”

Section: Introductionmentioning

confidence: 99%

Formation and Decomposition of Iron Nitrides Observed by in situ Powder Neutron Diffraction and Thermal Analysis

Widenmeyer

Hansen

Meissner

et al. 2014

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Abstract. In order to gain more information on the formation and decomposition behavior of various iron nitrides from different starting materials in situ neutron diffraction and thermal analysis under application of different gas atmospheres and heating rates were carried out. The following phases were observed during these investigations: crystalline α-Fe, γ-FeN z , γЈ-Fe 4 N y , ε-Fe 3 N 1+x , ζ-Fe 2 N, FeCl 2 , [Fe(NH 3 ) 6 ]Cl 2 , Fe(NH 3 ) 2 Cl 2 , and amorphous Fe(NH 3 )Cl 2 . In situ neutron diffraction data were collected in high quality, due to an optimized experimental setup with a time resolution of two minutes on D20 (Institut Laue-Langevin) allowing for detailed Rietveld analyses. For all phase transitions, decomposition and formation temperatures a strong

show abstract

Section: Introductionmentioning

confidence: 99%

Formation and Decomposition of Iron Nitrides Observed by in situ Powder Neutron Diffraction and Thermal Analysis

Widenmeyer

Hansen

Meissner

et al. 2014

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

show abstract

“…4 TiN, also crystallizing in the B1 structure, on the other hand is a nonmagnetic system showing superconductivity at low temperatures. 6 Other 3d transition metal mononitrides such as MnN and B1-FeN, [7][8][9] are antiferromagnetic. Thus, the discovery by Aivazov and Gurov of ferromagnetism in the solid solution system B1-Ti 1−x Cr x N ͑Ref.…”

Section: Introductionmentioning

confidence: 99%

Theory of the ferromagnetism inTi1−xCrxNsolid solutions

Alling

2010

Phys. Rev. B

View full text Add to dashboard Cite

First-principles calculations are used to investigate the magnetic properties of Ti 1−x Cr x N solid solutions. We show that the magnetic interactions between Cr spins that favor antiferromagnetism in CrN is changed upon alloying with TiN leading to the appearance of ferromagnetism in the system at approximately x Յ 0.50 in agreement with experimental reports. Furthermore we suggest that this effect originates in an electron density redistribution from Ti to Cr that decreases the polarization of Cr d states with t 2g symmetry while it increases the polarization of Cr d states with e g symmetry, both changes working in favor of ferromagnetism.

show abstract

“…Although the ZB is not the ground-state structure for these materials [13][14][15][16][17][18][19], we find interesting to study them in the ZB structure, since in it the Mn atoms find the same local environment as in diluted alloys, such as Ga 1−x Mn x As or Ga 1−x Mn x N (x<0.07). The tetrahedral coordination of the Mn atoms seems to play an important role in the understanding of the properties of the III-V DMS.…”

Section: Introductionmentioning

confidence: 99%

First-principles materials study for spintronics: MnAs and MnN

Paiva¹,

Alves²,

Nogueira³

et al. 2004

Braz. J. Phys.

View full text Add to dashboard Cite

We report ab-initio all electrons density-functional calculations for the electronic structure of the compounds MnAs and MnN, in the zinc-blende phase. They are potential materials for use in fabrication of new functional semiconductors taking advantage of the spin degree of freedom. The aim is the establishing of the semiconductor spin electronics (spintronics) as a practical technology [H. Ohno, Semiconductor Science and Technology 17, 4 (2002).]. We compare results obtained using the theoretical approaches LDA (Local Density Approximation) and GGA (Generalized Gradient Approximation). The calculations are spin-polarized and we follow the evolution of the band structures as a function of lattice parameter. We compare also the evolution of the density of states of the majority-spins and of the minority-spins. We conclude that, depending on the lattice parameter, both materials may be half-metallic, therefore showing conduction by charge carriers of one spin direction exclusively: the majority-spin band is continuous, while the minority-spin has a gap. Both materials reach a total magnetization of the order of 4 µ B . MnN changes from paramagnetic to ferromagnetic with the increase of the lattice parameter.

show abstract

Neutron Diffraction Studies of the Compounds MnN and FeN

Cited by 63 publications

References 17 publications

Formation and Decomposition of Iron Nitrides Observed by in situ Powder Neutron Diffraction and Thermal Analysis

Formation and Decomposition of Iron Nitrides Observed by in situ Powder Neutron Diffraction and Thermal Analysis

Theory of the ferromagnetism inTi1−xCrxNsolid solutions

First-principles materials study for spintronics: MnAs and MnN

Contact Info

Product

Resources

About