Magnetic ordering in single crystals of

Heat capacity measurements on pure but twinned single crystals of reveal a sharp peak at , which according to thermal expansion, neutron diffraction, and magnetic susceptibility measurements originates from an antiferromagnetic ordering of the Pr-ion moments. A modest coupling to the Cu(2) spin system is observed. Below a first-order transition in the magnetic structure of the Pr spin system (at 13.4 K in warming; in cooling) is found. Field-dependent heat capacity data show anisotropic temperature dependences of the -peaks and recover a Schottky-like anomaly due to the crystal-field-split ground state of the .

[1]  X. Tong,et al.  Density-functional theory with optimized effective potential and self-interaction correction for ground states and autoionizing resonances , 1997 .

[2]  J. Lynn,et al.  Observation of Pr magnetic order in PrBa{sub 2}Cu{sub 3}O{sub 7} , 1997 .

[3]  A. Longmore,et al.  Novel Pr-Cu Magnetic Phase at Low Temperature in PrBa{sub 2}Cu{sub 3}O{sub 6{ital +x}} Observed by Neutron Diffraction , 1997 .

[4]  E. Specht,et al.  Nonstoichiometry and decomposition of Pr1+zBa2−zCu3Oy and comparison with Y123, La123 and Nd123 , 1996 .

[5]  Pieper,et al.  Local magnetism and crystal fields of Pr in PrBa2Cu3O7 studied by 141Pr NMR. , 1996, Physical review letters.

[6]  Sarkar,et al.  Structural, magnetic, and crystalline electric-field effects in single crystals of Y1-xPrxBa2Cu3O7- delta. , 1996, Physical review. B, Condensed matter.

[7]  R. Flükiger,et al.  The use of BaZrO3 crucibles in crystal growth of the high-Tc superconductors Progress in crystal growth as well as in sample quality , 1996 .

[8]  V. Nekvasil.  Rare-earth magnetism in cuprates , 1995 .

[9]  Walter,et al.  Valence of praseodymium in PrxY1-xBa2Cu3O7- delta : Inelastic-neutron-scattering, specific-heat, and susceptibility study. , 1994, Physical review. B, Condensed matter.

[10]  P. Bonville,et al.  Magnetic correlations in Pr1−xYxBa2Cu3O7 studied by Mössbauer spectroscopy on substituted 170Yb3+ , 1993 .

[11]  R. Osborn,et al.  The magnetic state of Pr in PrBa2Cu3O7 , 1993 .

[12]  G. Shirane,et al.  Neutron-scattering study of antiferromagnetism in YBa2Cu3O6.15. , 1993, Physical review. B, Condensed matter.

[13]  Rice,et al.  Unusual electronic structure of PrBa2Cu3O7. , 1993, Physical review letters.

[14]  P. Pernambuco-Wise,et al.  Magnetic ordering of the Cu spins in PrBa2Cu3O6+x , 1992 .

[15]  H. Radousky.  A review of the superconducting and normal state properties of Y_1−xPr_xBa_2Cu_3O_7 , 1992 .

[16]  M. Maple,et al.  Hybridization, hole localization and pair breaking in the high Tc superconducting system Y1-xPrxBa2Cu3O7-δ , 1992 .

[17]  R. J. Brown,et al.  The heat capacity and derived thermophysical properties of the high TC superconductor YBa2Cu3O7−δ from 5.3 to 350 K , 1990 .

[18]  Adams,et al.  Magnetic ordering in (Y1-xPrx)Ba2Cu3O7 as observed by muon-spin relaxation. , 1990, Physical review. B, Condensed matter.

[19]  Lynn,et al.  Magnetic order of Pr in PrBa2Cu3O7. , 1989, Physical review. B, Condensed matter.

[20]  R. Pott,et al.  Apparatus for measuring the thermal expansion of solids between 1.5 and 380K , 1983 .