Magnetic-field-enhanced spin freezing on the verge of charge ordering in YBa2Cu3
O6.45

Wu, T.; Mayaffre, H.; Kramer, S.; Horvatic, M.; Berthier, C.; Lin, C. T.; Haug, D.; Loew, T.; Hinkov, V.; Keimer, B.; Julien, M. H.

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Magnetic-field-enhanced spin freezing on the verge of charge ordering in YBa₂Cu₃O_6.45

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Kramer, S.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Horvatic, M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Berthier, C.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280238

Lin, C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons133805

Haug, D.
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Loew, T.
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Hinkov, V.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Keimer, B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Wu, T., Mayaffre, H., Kramer, S., Horvatic, M., Berthier, C., Lin, C. T., et al. (2013). Magnetic-field-enhanced spin freezing on the verge of charge ordering in YBa₂Cu₃O_6.45. Physical Review B, 88(1): 014511.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C63F-D

Abstract

Using Cu-63 NMR, we establish that the enhancement of spin order by a magnetic field H in YBa2Cu3O6.45 arises from a competition with superconductivity because the effect occurs for H perpendicular, but not parallel, to the CuO2 planes, and it persists up to field values comparable to H-c2. We also find that the spin freezing has a glassy nature and that the frozen state onsets at a temperature which is independent of the magnitude of H. These results, together with the presence of a competing charge-ordering instability at nearby doping levels, are strikingly parallel to those previously obtained in La-214. This suggests a universal interpretation of magnetic field effects in underdoped cuprates where the enhancement of spin order by the field may not be the primary phenomenon but rather a byproduct of the competition between superconductivity and charge order. We also observe that low-energy spin fluctuations are manifested up to relatively high temperatures where they partially mask the signature of the pseudogap in 1/T-1 data of planar Cu sites.