Effect of lattice distortion on magnetic and electronic state of α″-Fe16N2

Satoshi Okamoto; Osamu Kitakami; Yutaka Shimada

doi:10.1063/1.370056

Effect of lattice distortion on magnetic and electronic state of α″-Fe₁₆N₂

Satoshi Okamoto, Osamu Kitakami, Yutaka Shimada

IMRAM - Division of Inorganic Material Research

Tohoku University

Research output: Contribution to journal › Conference article › peer-review

12 Citations (Scopus)

Abstract

We have studied the correlation of the magnetic moment and electronic state of α″-Fe₁₆N₂ with the lattice distortion. The epitaxial (α″+α′)-Fe₁₆N₂ films were fabricated on Ag(001) underlayers by sputter beam method. With decreasing the film thickness, the unit cell volume of α″-Fe₂₆N₂ increased and distinct enhancement of the magnetic moment up to 2.8μ_B/Fe atom was found. The precisely determined x-ray diffraction intensity ratio I_α″(002)/I_α″(006) apparently reduced with increase of the unit cell volume. From our theoretical calculations, reduction of I_α″(002)/I_α″(006) means increase of the valency of N atoms in α″-Fe₁₆N₂. Therefore, it is considered that increase of the magnetic moment of α″-Fe₁₆N₂ is attributed to the charge transfer from N to Fe due to lattice expansion effect. This is the first observation showing close relationship between the electronic state and the magnetic moment of α″-Fe₁₆N₂.

Original language	English
Pages (from-to)	4952-4954
Number of pages	3
Journal	Journal of Applied Physics
Volume	85
Issue number	8 II A
DOIs	https://doi.org/10.1063/1.370056
Publication status	Published - 1999 Apr 15
Event	Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, United States Duration: 1998 Nov 9 → 1998 Nov 12

Access to Document

10.1063/1.370056

Cite this

@article{27e25b9396d148d3a3ded0a6ff658c64,

title = "Effect of lattice distortion on magnetic and electronic state of α″-Fe16N2",

abstract = "We have studied the correlation of the magnetic moment and electronic state of α″-Fe16N2 with the lattice distortion. The epitaxial (α″+α′)-Fe16N2 films were fabricated on Ag(001) underlayers by sputter beam method. With decreasing the film thickness, the unit cell volume of α″-Fe26N2 increased and distinct enhancement of the magnetic moment up to 2.8μB/Fe atom was found. The precisely determined x-ray diffraction intensity ratio Iα″(002)/Iα″(006) apparently reduced with increase of the unit cell volume. From our theoretical calculations, reduction of Iα″(002)/Iα″(006) means increase of the valency of N atoms in α″-Fe16N2. Therefore, it is considered that increase of the magnetic moment of α″-Fe16N2 is attributed to the charge transfer from N to Fe due to lattice expansion effect. This is the first observation showing close relationship between the electronic state and the magnetic moment of α″-Fe16N2.",

author = "Satoshi Okamoto and Osamu Kitakami and Yutaka Shimada",

year = "1999",

month = apr,

day = "15",

doi = "10.1063/1.370056",

language = "English",

volume = "85",

pages = "4952--4954",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "8 II A",

note = "Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials ; Conference date: 09-11-1998 Through 12-11-1998",

}

TY - JOUR

T1 - Effect of lattice distortion on magnetic and electronic state of α″-Fe16N2

AU - Okamoto, Satoshi

AU - Kitakami, Osamu

AU - Shimada, Yutaka

PY - 1999/4/15

Y1 - 1999/4/15

N2 - We have studied the correlation of the magnetic moment and electronic state of α″-Fe16N2 with the lattice distortion. The epitaxial (α″+α′)-Fe16N2 films were fabricated on Ag(001) underlayers by sputter beam method. With decreasing the film thickness, the unit cell volume of α″-Fe26N2 increased and distinct enhancement of the magnetic moment up to 2.8μB/Fe atom was found. The precisely determined x-ray diffraction intensity ratio Iα″(002)/Iα″(006) apparently reduced with increase of the unit cell volume. From our theoretical calculations, reduction of Iα″(002)/Iα″(006) means increase of the valency of N atoms in α″-Fe16N2. Therefore, it is considered that increase of the magnetic moment of α″-Fe16N2 is attributed to the charge transfer from N to Fe due to lattice expansion effect. This is the first observation showing close relationship between the electronic state and the magnetic moment of α″-Fe16N2.

AB - We have studied the correlation of the magnetic moment and electronic state of α″-Fe16N2 with the lattice distortion. The epitaxial (α″+α′)-Fe16N2 films were fabricated on Ag(001) underlayers by sputter beam method. With decreasing the film thickness, the unit cell volume of α″-Fe26N2 increased and distinct enhancement of the magnetic moment up to 2.8μB/Fe atom was found. The precisely determined x-ray diffraction intensity ratio Iα″(002)/Iα″(006) apparently reduced with increase of the unit cell volume. From our theoretical calculations, reduction of Iα″(002)/Iα″(006) means increase of the valency of N atoms in α″-Fe16N2. Therefore, it is considered that increase of the magnetic moment of α″-Fe16N2 is attributed to the charge transfer from N to Fe due to lattice expansion effect. This is the first observation showing close relationship between the electronic state and the magnetic moment of α″-Fe16N2.

UR - http://www.scopus.com/inward/record.url?scp=0001651257&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001651257&partnerID=8YFLogxK

U2 - 10.1063/1.370056

DO - 10.1063/1.370056

M3 - Conference article

AN - SCOPUS:0001651257

SN - 0021-8979

VL - 85

SP - 4952

EP - 4954

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8 II A

T2 - Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials

Y2 - 9 November 1998 through 12 November 1998

ER -

Effect of lattice distortion on magnetic and electronic state of α″-Fe₁₆N₂

Abstract

Access to Document

Other files and links

Fingerprint

Cite this