@article {Guskos1992597,
	title = {Low-Temperature Dependence of the EPR Spectra of Gd0.5RE0.5Ba2Cu3O7-δ Compounds in the Tetragonal Phase},
	journal = {physica status solidi (b)},
	volume = {170},
	number = {2},
	year = {1992},
	note = {cited By 6},
	pages = {597-607},
	abstract = {The EPR spectra of perovskite ceramics of Gd0.5RE0.5Ba2Cu3O7-δ type (RE  La, Pr, Nd, Sm, Eu, Dy, Ho, Y, Er, Tm, Yb, and Lu) in tetragonal (non-HTC) phase are investigated as a function of temperature in the range 40 to 3 K. A signal arising from the isotropic exchange interaction of coupled pairs of Cu2+ ions is detected. The intensity of this signal is strongly dependent on the RE ions and its g-factor varies with temperature. Magnetic measurements show the existence of ferromagnetic anomalies at these low temperature. In the orthorhombic phase, these materials exhibit a superconducting phase transition in the range of 85 to 95 K, apart from the samples with La ions where a TC ≈ 69 K is found and the samples with Prions where a superconducting state can not be observed. Copyright {\textcopyright} 1992 WILEY-VCH Verlag GmbH \&amp; Co. KGaA},
	doi = {10.1002/pssb.2221700225},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-2842578358\&doi=10.1002\%2fpssb.2221700225\&partnerID=40\&md5=7263ab70032c9784c6aa63d5387a34cb},
	author = {Guskos, N. and V. Likodimos and Londos, C.A. and Windsch, W. and Metz, H. and Koufoudakis, A. and Mitros, C. and Gamari-Seale, H. and Niarchos, D.}
}
