Structural, magnetic and electronic state characterization of L1 0-type ordered FeNi alloy extracted from a natural meteorite.
To understand the hard magnetism of L10-type ordered FeNi alloy, we extracted the L10-FeNi phase from a natural meteorite, and evaluated its fundamental solid-state properties: sample composition, magnetic hysteresis, crystal structure and electronic structure. We executed multidirectional analyses using scanning electron microscopy with an electron probe micro-analyzer (SEM-EPMA), a superconducting quantum interference device (SQUID), x-ray diffraction (XRD) and magnetic circular dichroism (MCD). As a result, we found that the composition was Fe: 50.47 ± 1.98 at.%, Ni: 49.60 ± 1.49 at.%, and an obvious superlattice peak is confirmed. The estimated degree of order was 0.608, with lattice constants a = b = 3.582 Å and c = 3.607 Å. The obtained coercivity was more than 500 Oe. MCD analysis using the K absorption edge suggests that the magnetic anisotropy could originate from the orbital magnetic moment of 3d electrons in Fe; this result is consistent with that in a previous report obtained with synthetic L10-FeNi.
M
M
Kotsugi
H
H
Maruyama
N
N
Ishimatsu
N
N
Kawamura
M
M
Suzuki
M
M
Mizumaki
K
K
Osaka
T
T
Matsumoto
T
T
Ohkochi
T
T
Ohtsuki
D000497:Alloys / Q000737:chemistry*; D004583:Electrons; D007501:Iron / Q000737:chemistry*; D060328:Magnetic Phenomena; D019110:Meteoroids; D009532:Nickel / Q000737:chemistry*
D000497:Alloys; D009532:Nickel; D007501:Iron