Magnetoresistance of nanocrystallized amorphous Fe-Zr-(Ru) alloys

K. Suzuki; J. W. Cochrane; K. Aoki; J. M. Cadogan

doi:10.1016/S0304-8853(01)01260-4

Magnetoresistance of nanocrystallized amorphous Fe-Zr-(Ru) alloys

K. Suzuki, J. W. Cochrane, K. Aoki, J. M. Cadogan

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

We have studied the magnetic and magnetotransport properties of melt-spun Fe₉₁Zr₈Cu₁ and Fe₈₁Zr₈Cu₁Ru₁₀. The Fe₉₁Zr₈Cu₁ alloy after nanocrystallization at 753 K for 14.4 ks shows conventional anisotropic magnetoresistance (MR). On the other hand, spin-dependent MR (Δρ≈-0.04 μΩ cm) is confirmed for the Fe₈₁Zr₈Cu₁Ru₁₀ alloy after the same nanocrystallization treatment. Our ⁵⁷Fe Mössbauer results indicate that the residual amorphous phase in the Ru-free alloy is ferromagnetic, whereas that in the Ru-doped alloy is paramagnetic. The spin-dependent MR in Fe₈₁Zr₈Cu₁Ru₁₀ is considered to be due to the inhibition of the intergranular magnetic coupling by this paramagnetic amorphous phase. Our study shows that the magnetotransport in BCC-Fe/amorphous two-phase nanocrystalline systems can be spin-dependent.

Original language	English
Pages (from-to)	273-275
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	242-245
Issue number	PART I
DOIs	https://doi.org/10.1016/S0304-8853(01)01260-4
Publication status	Published - 1 Apr 2002
Externally published	Yes

Keywords

Magnetoresistance - melt-spun ribbons
Mössbauer spectroscopy
Nanocrystallization

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10.1016/S0304-8853(01)01260-4

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title = "Magnetoresistance of nanocrystallized amorphous Fe-Zr-(Ru) alloys",

abstract = "We have studied the magnetic and magnetotransport properties of melt-spun Fe91Zr8Cu1 and Fe81Zr8Cu1Ru10. The Fe91Zr8Cu1 alloy after nanocrystallization at 753 K for 14.4 ks shows conventional anisotropic magnetoresistance (MR). On the other hand, spin-dependent MR (Δρ≈-0.04 μΩ cm) is confirmed for the Fe81Zr8Cu1Ru10 alloy after the same nanocrystallization treatment. Our 57Fe M{\"o}ssbauer results indicate that the residual amorphous phase in the Ru-free alloy is ferromagnetic, whereas that in the Ru-doped alloy is paramagnetic. The spin-dependent MR in Fe81Zr8Cu1Ru10 is considered to be due to the inhibition of the intergranular magnetic coupling by this paramagnetic amorphous phase. Our study shows that the magnetotransport in BCC-Fe/amorphous two-phase nanocrystalline systems can be spin-dependent.",

keywords = "Magnetoresistance - melt-spun ribbons, M{\"o}ssbauer spectroscopy, Nanocrystallization",

author = "K. Suzuki and Cochrane, {J. W.} and K. Aoki and Cadogan, {J. M.}",

year = "2002",

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doi = "10.1016/S0304-8853(01)01260-4",

language = "English",

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TY - JOUR

T1 - Magnetoresistance of nanocrystallized amorphous Fe-Zr-(Ru) alloys

AU - Suzuki, K.

AU - Cochrane, J. W.

AU - Aoki, K.

AU - Cadogan, J. M.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - We have studied the magnetic and magnetotransport properties of melt-spun Fe91Zr8Cu1 and Fe81Zr8Cu1Ru10. The Fe91Zr8Cu1 alloy after nanocrystallization at 753 K for 14.4 ks shows conventional anisotropic magnetoresistance (MR). On the other hand, spin-dependent MR (Δρ≈-0.04 μΩ cm) is confirmed for the Fe81Zr8Cu1Ru10 alloy after the same nanocrystallization treatment. Our 57Fe Mössbauer results indicate that the residual amorphous phase in the Ru-free alloy is ferromagnetic, whereas that in the Ru-doped alloy is paramagnetic. The spin-dependent MR in Fe81Zr8Cu1Ru10 is considered to be due to the inhibition of the intergranular magnetic coupling by this paramagnetic amorphous phase. Our study shows that the magnetotransport in BCC-Fe/amorphous two-phase nanocrystalline systems can be spin-dependent.

AB - We have studied the magnetic and magnetotransport properties of melt-spun Fe91Zr8Cu1 and Fe81Zr8Cu1Ru10. The Fe91Zr8Cu1 alloy after nanocrystallization at 753 K for 14.4 ks shows conventional anisotropic magnetoresistance (MR). On the other hand, spin-dependent MR (Δρ≈-0.04 μΩ cm) is confirmed for the Fe81Zr8Cu1Ru10 alloy after the same nanocrystallization treatment. Our 57Fe Mössbauer results indicate that the residual amorphous phase in the Ru-free alloy is ferromagnetic, whereas that in the Ru-doped alloy is paramagnetic. The spin-dependent MR in Fe81Zr8Cu1Ru10 is considered to be due to the inhibition of the intergranular magnetic coupling by this paramagnetic amorphous phase. Our study shows that the magnetotransport in BCC-Fe/amorphous two-phase nanocrystalline systems can be spin-dependent.

KW - Magnetoresistance - melt-spun ribbons

KW - Mössbauer spectroscopy

KW - Nanocrystallization

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U2 - 10.1016/S0304-8853(01)01260-4

DO - 10.1016/S0304-8853(01)01260-4

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SN - 0304-8853

VL - 242-245

SP - 273

EP - 275

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - PART I

ER -

Magnetoresistance of nanocrystallized amorphous Fe-Zr-(Ru) alloys

Abstract

Keywords

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