Magnetic Field Induced Low-Energy Spin Excitations in YBa2Cu4O8 Measured by High Field Gd3+ Electron Spin Resonance

Titusz Fehér, András Jánossy, Gábor Oszlányi, Ferenc Simon, Bogdan Dabrowski, Piotr W. Klamut, Mladen Horvatić, Grant V.M. Williams

Research output: Article

7 Citations (Scopus)


We have measured the spin susceptibility, χs, of the CuO2 planes in the underdoped high Tc superconductor, electron spin resonance (ESR) in single crystals and aligned powders in fields up to 15.4 T. At low temperatures and high fields, χs is enhanced slightly in the B‖c orientation with respect to the B⊥c orientation. The enhancement at 15.4T (≈0.15Hc2) at 16K (0.2Tc) is small: approximately 10% of χs(Tc), suggesting that the second critical field of superconductivity, Hc2≈100T, would not suppress the pseudogap. This work demonstrates the potential of high field ESR in single crystals for studying high Tc superconductors.

Original languageEnglish
Pages (from-to)5627-5630
Number of pages4
JournalPhysical review letters
Issue number26
Publication statusPublished - jan. 1 2000


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this