Superconductivity and weak ferromagnetism in Eu1.4Ce0.6Ru1-xFexSr 2Cu2O10-δ

I. Felner; U. Asaf

doi:10.1016/S0921-4534(97)01673-0

Superconductivity and weak ferromagnetism in Eu_1.4Ce_0.6Ru_1-xFe_xSr ₂Cu₂O_10-δ

I. Felner^*
, U. Asaf

^*Corresponding author for this work

Racah Institute of Physics

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

31 Scopus citations

Abstract

The system Eu_1.4Ce_0.6Ru_1-xFe_xSr ₂Cu₂O_10-δ with x = 0, 0.13 and 0.25 has been studied by dc magnetometry to determine the superconducting and weak-ferromagnetic (W-FM) properties. Eu_1.4Ce_0.6RuSr₂Cu₂O _10-δ is a magneto-superconductor with T_M(Ru) = 122 and T_C = 32 K thus T_M ≫ T_C. Superconductivity is confined to the CuO₂ planes, and the magnetic ordering is due to the Ru sublattice. The effect of Fe (x = 0.13 and 0.25) is: (i) to suppress SC in both compounds and (ii) to diminish the weak-ferromagnetic (W-FM) properties (e.g. the saturation moment (M_sat) and the remanent moments) of the Ru sublattice. The fast drop in M_sat at 5 K scales with Fe concentration. Mossbauer spectroscopy studies reveal two inequivalent Fe sites, and that in both sites, Fe does not order magnetically. This proves that the W-FM state is due to the Ru site.

Original language	English
Pages (from-to)	97-103
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	292
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(97)01673-0
State	Published - 10 Dec 1997

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title = "Superconductivity and weak ferromagnetism in Eu1.4Ce0.6Ru1-xFexSr 2Cu2O10-δ",

abstract = "The system Eu1.4Ce0.6Ru1-xFexSr 2Cu2O10-δ with x = 0, 0.13 and 0.25 has been studied by dc magnetometry to determine the superconducting and weak-ferromagnetic (W-FM) properties. Eu1.4Ce0.6RuSr2Cu2O 10-δ is a magneto-superconductor with TM(Ru) = 122 and TC = 32 K thus TM ≫ TC. Superconductivity is confined to the CuO2 planes, and the magnetic ordering is due to the Ru sublattice. The effect of Fe (x = 0.13 and 0.25) is: (i) to suppress SC in both compounds and (ii) to diminish the weak-ferromagnetic (W-FM) properties (e.g. the saturation moment (Msat) and the remanent moments) of the Ru sublattice. The fast drop in Msat at 5 K scales with Fe concentration. Mossbauer spectroscopy studies reveal two inequivalent Fe sites, and that in both sites, Fe does not order magnetically. This proves that the W-FM state is due to the Ru site.",

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AU - Asaf, U.

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Y1 - 1997/12/10

N2 - The system Eu1.4Ce0.6Ru1-xFexSr 2Cu2O10-δ with x = 0, 0.13 and 0.25 has been studied by dc magnetometry to determine the superconducting and weak-ferromagnetic (W-FM) properties. Eu1.4Ce0.6RuSr2Cu2O 10-δ is a magneto-superconductor with TM(Ru) = 122 and TC = 32 K thus TM ≫ TC. Superconductivity is confined to the CuO2 planes, and the magnetic ordering is due to the Ru sublattice. The effect of Fe (x = 0.13 and 0.25) is: (i) to suppress SC in both compounds and (ii) to diminish the weak-ferromagnetic (W-FM) properties (e.g. the saturation moment (Msat) and the remanent moments) of the Ru sublattice. The fast drop in Msat at 5 K scales with Fe concentration. Mossbauer spectroscopy studies reveal two inequivalent Fe sites, and that in both sites, Fe does not order magnetically. This proves that the W-FM state is due to the Ru site.

AB - The system Eu1.4Ce0.6Ru1-xFexSr 2Cu2O10-δ with x = 0, 0.13 and 0.25 has been studied by dc magnetometry to determine the superconducting and weak-ferromagnetic (W-FM) properties. Eu1.4Ce0.6RuSr2Cu2O 10-δ is a magneto-superconductor with TM(Ru) = 122 and TC = 32 K thus TM ≫ TC. Superconductivity is confined to the CuO2 planes, and the magnetic ordering is due to the Ru sublattice. The effect of Fe (x = 0.13 and 0.25) is: (i) to suppress SC in both compounds and (ii) to diminish the weak-ferromagnetic (W-FM) properties (e.g. the saturation moment (Msat) and the remanent moments) of the Ru sublattice. The fast drop in Msat at 5 K scales with Fe concentration. Mossbauer spectroscopy studies reveal two inequivalent Fe sites, and that in both sites, Fe does not order magnetically. This proves that the W-FM state is due to the Ru site.

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Superconductivity and weak ferromagnetism in Eu_1.4Ce_0.6Ru_1-xFe_xSr ₂Cu₂O_10-δ

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