Similar glassy features in the L 139 a NMR response of pure and disordered La1.88 Sr0.12 CuO4

V. F. Mitrović, M. H. Julien, C. De Vaulx, M. Horvatić, C. Berthier, Takao Suzuki, K. Yamada

Research output: Contribution to journalArticle

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Abstract

High Tc superconductivity in La2-x Srx CuO4 coexists with (striped and glassy) magnetic order. Here, we report NMR measurements of the L 139 a spin-lattice relaxation, which displays a stretched-exponential time dependence, in both pure and disordered x=0.12 single crystals. An analysis in terms of a distribution of relaxation rates T 139 1 -1 indicates that: (i) the spin-freezing temperature is spatially inhomogeneous with an onset at Tg onset =20 K for the pristine samples and (ii) the width of the T1 -1 distribution in the vicinity of Tg onset is insensitive to an ∼1% level of atomic disorder in CuO2 planes. This suggests that the stretched-exponential L 139 a relaxation, considered as a manifestation of the system's glassiness, may not arise from quenched disorder.

Original languageEnglish
Article number014504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number1
DOIs
Publication statusPublished - 2008 Jul 8
Externally publishedYes

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Spin-lattice relaxation
Superconductivity
Freezing
Nuclear magnetic resonance
Single crystals
disorders
nuclear magnetic resonance
spin-lattice relaxation
freezing
time dependence
superconductivity
Temperature
single crystals
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

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Similar glassy features in the L 139 a NMR response of pure and disordered La1.88 Sr0.12 CuO4. / Mitrović, V. F.; Julien, M. H.; De Vaulx, C.; Horvatić, M.; Berthier, C.; Suzuki, Takao; Yamada, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 1, 014504, 08.07.2008.

Research output: Contribution to journalArticle

Mitrović, V. F. ; Julien, M. H. ; De Vaulx, C. ; Horvatić, M. ; Berthier, C. ; Suzuki, Takao ; Yamada, K. / Similar glassy features in the L 139 a NMR response of pure and disordered La1.88 Sr0.12 CuO4. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 78, No. 1.
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AU - Berthier, C.

AU - Suzuki, Takao

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