Thermodynamic and pressure dependent magnetic characteristics of PrBa2Cu3O7

Effect of pressure on the Cu and Pr magnetism in Nd1−xPrxBa2Maisuradze1, Graneli2, Guguchia3 et al. 2013Phys. Rev. B71120View full textAdd to dashboardCite

“…The present results for the PE on both T Cu N and T Pr N suggest an increased localization of carriers with P and drastically differ from those reported previously for PrBa 2 Cu 3 O 7−δ 32 and PrBa 2 Cu 4 O 8 , 33 as obtained by magnetization measurements under pressure. It contrasts also with the positive hydrostatic PE on T c found in superconducting PrBa 2 Cu 3 O 7−δ (see Fig.…”

“…We found an increase of T Pr N with increasing pressure at a rate + 0.7 K/GPa for 0.3 < x < 1 which is in contrast to previous reports, 32,33 but consistent with the negative hydrostatic PE on T c and coincides with the result of PE on T Pr N determined with INS experiments, 34 suggesting an increased localization of the carriers with pressure. We do not observe any superconducting phase for pressures up to 2.3 GPa.…”

“…For x = 1, no and a small positive PE on T Pr N were found by transport and INS experiments, respectively. 34,51 In contrast, a negative PE on T Pr N was reported for PrBa 2 Cu 3 O 7−δ 32 and PrBa 2 Cu 4 O 8 33 with a large For T Pr N = 17 K a linear extrapolation suggests that for P 1.7 GPa the Pr Néel order might be suppressed completely, and followed by a transition to a superconducting phase. Indeed, in PrBa 2 Cu 3 O 7−δ thin-film, 22 polycrystalline, 52,53 and single-crystal 23,24 samples superconductivity with an unusually strong and positive effect of hydrostatic pressure 23,24 on T c has been found.…”

“…In several aspects the present results differ drastically from those reported previously. 32,33 The effect of pressure on the Pr Néel ordering temperature T Pr N was found to be positive for all the investigated Pr concentrations x, amounting to + 0.7 K/GPa. This finding is in agreement with the negative effect of pressure on the superconducting transition temperature T c observed for 0.1 < x < 0.3 and coincides with the result of inelastic neutron scattering experiments.…”

“…7(b)]. Surprisingly, though, a rather strong suppression of T Pr N was reported for PrBa 2 Cu 3 O 7−δ 32 and PrBa 2 Cu 4 O 8 33 with ∂T Pr N /∂P −10 K/GPa. These results indicate a delocalization of the carriers with P and suggest a complete suppression of T Pr N at P 1.7 GPa (T Pr N 17 K for x = 1).…”