Journal of Low Temperature Physics

, Volume 52, Issue 5–6, pp 481–496 | Cite as

Magnetic properties of RE2Mo2O7 pyrochlores

  • R. Ranganathan
  • G. Rangarajan
  • R. Srinivasan
  • M. A. Subramanian
  • G. V. Subba Rao
Article

Abstract

The magnetic properties of RE2Mo2O7 (RE=Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+, and Yb3+) and of solid solutions of the type (Nd1−xA x )2Mo2O7 (A=Yb or Er; 0.05≤x≤0.4) have been studied using an ac mutual inductance bridge. All the compounds were found to exhibit magnetic ordering in the neighborhood of or below 77 K. The data have been analyzed using (i) the available susceptibility data on Y2Mo2O7, (ii) a ferromagnetic coupling among the Mo4+ ions to obtain the contribution from the RE3+ ion, and (iii) the available susceptibility data on RE2Ti2O7 to obtain the contribution from the Mo4+ ions. It was found that procedure (iii) gave the most satisfactory explanation of the magnetic ordering. The results indicated that (1) the Mo4+ ions become ordered magnetically, (2) the behavior of the RE3+ ions is almost the same as in the isostructural RE2Ti2O7 and RE2V2O7 compounds, and (3) the susceptibility values differ appreciably as we go from Nd3+ to Yb3+, possibly due to narrowing of the π* Mo-O conduction band.

Keywords

Solid Solution Magnetic Property Conduction Band Magnetic Material Mutual Inductance 

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • R. Ranganathan
    • 1
  • G. Rangarajan
    • 1
  • R. Srinivasan
    • 1
  • M. A. Subramanian
    • 2
  • G. V. Subba Rao
    • 2
  1. 1.Low Temperature Laboratory, Department of PhysicsIndian Institute of TechnologyMadrasIndia
  2. 2.Materials Science Research CentreIndian Institute of TechnologyMadrasIndia

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