Normal-state spin dynamics in the spin-triplet superconductor Sr2RuO4

K. Ishida; H. Mukuda; Y. Minami; Y. Kitaoka; Z. Q. Mao; H. Fukazawa; Y. Maeno

Normal-state spin dynamics in the spin-triplet superconductor Sr₂RuO₄

K. Ishida, H. Mukuda, Y. Minami, Y. Kitaoka, Z. Q. Mao, H. Fukazawa, Y. Maeno

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Abstract

Magnetic properties in the normal state of spin-triplet superconductor Sr₂RuO₄ are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T₁ at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, X″_IC,out(q,ω) is by a factor of ∼3 larger than the in-plane one, X″_IC,in(q,ω). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.

Original language	English (US)
Article number	100501
Pages (from-to)	1005011-1005014
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	10
State	Published - Sep 1 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Normal-state spin dynamics in the spin-triplet superconductor Sr2RuO4",

abstract = "Magnetic properties in the normal state of spin-triplet superconductor Sr2RuO4 are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T1 at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, X″IC,out(q,ω) is by a factor of ∼3 larger than the in-plane one, X″IC,in(q,ω). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.",

author = "K. Ishida and H. Mukuda and Y. Minami and Y. Kitaoka and Mao, {Z. Q.} and H. Fukazawa and Y. Maeno",

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T1 - Normal-state spin dynamics in the spin-triplet superconductor Sr2RuO4

AU - Ishida, K.

AU - Mukuda, H.

AU - Minami, Y.

AU - Kitaoka, Y.

AU - Mao, Z. Q.

AU - Fukazawa, H.

AU - Maeno, Y.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - Magnetic properties in the normal state of spin-triplet superconductor Sr2RuO4 are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T1 at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, X″IC,out(q,ω) is by a factor of ∼3 larger than the in-plane one, X″IC,in(q,ω). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.

AB - Magnetic properties in the normal state of spin-triplet superconductor Sr2RuO4 are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T1 at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, X″IC,out(q,ω) is by a factor of ∼3 larger than the in-plane one, X″IC,in(q,ω). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.

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JO - Physical Review B - Condensed Matter and Materials Physics

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IS - 10

M1 - 100501

ER -

Normal-state spin dynamics in the spin-triplet superconductor Sr₂RuO₄

Abstract

All Science Journal Classification (ASJC) codes

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