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Magnetic and superconducting properties of MoSr2HoCu2O8-δ

N. BALCHEV1,* , K. NENKOV2,3, G. MIHOVA1, B. KUNEV4, J. PIROV5, D. A. DIMITROV1

Affiliation

  1. "George Nadjakov" Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. Institut fur Festkorper- und Werkstofforschung, 01171 Dresden, Germany
  3. International Laboratory of High Magnetic Fields and Low Temperatures, 53-421 Wroclaw, Poland
  4. Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
  5. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Abstract

Samples with nominal composition MoSr2HoCu2O8-δ were synthesized and their magnetic and superconducting properties were investigated. MoSr2HoCu2O8-δ has a superconducting transition at Tc=27 K and an AFM one at TN=13 K. It was established that the magnetic order is of a long range type. The coincidence of the obtained experimental value of the Curie constant and the theoretical one of the Ho-containing Mo-1212 shows that the magnetic properties of the samples are determined by the highly dominating phase Mo-1212. The double resistive SC transition, together with the absence of both diamagnetism and peak in the specific heat between the two critical temperatures denote the presence of granular superconductivity. The latter phenomenon and the observed Mo-deficiency can explain the low superconducting volume fraction of the samples..

Keywords

Mo-1212, Superconductivity, Antiferromagnetism, Mo-Sr-Ho-Cu-O material.

Submitted at: Feb. 28, 2008
Accepted at: Oct. 7, 2008

Citation

N. BALCHEV, K. NENKOV, G. MIHOVA, B. KUNEV, J. PIROV, D. A. DIMITROV, Magnetic and superconducting properties of MoSr2HoCu2O8-δ, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2757-2761 (2008)