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標題: Antiferromagnetism of R2BaPdO5 (R = La, Nd, Pr, Sm, Eu, Gd, Dy, Ho)
作者: Taniguchi, T.
Kawaji, Y.
Ozawa, T.C.
Nagata, Y.
Noro, Y.
Samata, H.
Lan, M.D.
關鍵字: crystallographic property;magetic property;antiferromagnetism;metamagnetism;magnetic linear chain;R2BaPdO5;magnetic-properties;iron garnets;transitions;yb
Project: Journal of Alloys and Compounds
期刊/報告no:: Journal of Alloys and Compounds, Volume 386, Issue 1-2, Page(s) 63-69.
The crystallographic and magnetic properties of R2BaPdO5 (R = La, Pr, Nd, Sm, Eu, Gd, Dy, Ho) were investigated. R2BaPdO5 has a tetragonal lattice (P4/mbm) and rare-earth ions make a layered structure with the R-O-R chain. where major R-O-R magnetic interaction occurs. R2BaPdO5 (R = La, Eu) showed a paramagnetic behavior with small temperature-dependent susceptibilities, indicating the non-magnetic states of Pd2+. The effective moment P-eff of R2BaPdO5 (R = Pr, Nd, Gd, Dy, Ho) can be explained by g(1)rootJ(J + 1) of the rare-earth ions. R2BaPdO5 (R = Nd, Sm, Gd, Dy, Ho) showed antiferrornagnetism with T-N between 2 and 5 K. R2BaPdO5 (R = Dy, Ho) showed metamagnetic transition at 2 K, whereas a clear metamagnetic transition was not observed for R2BaPdO5 (R = Gd, Nd). No magnetic transition was observed for Pr2BaPdO5 in spite of the Curie-Weiss-type paramagnetic behavior at higher temperatures. The saturation magnetization estimated at 2 K from the magnetization at 70 kOe was explained by taking account of Kramer's doublet for R2BaPdO5 (R = Nd, Sm, Dy) and the enhancement by the exchange interaction for Ho2BaPdO5. (C) 2004 Elsevier B.V. All rights reserved.
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2004.05.057
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