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標題: Antiferromagnetism of LnRhO(3) (Ln = rare earth)
作者: Ohnishi, T.
Taniguchi, T.
Ikoshi, A.
Mizusaki, S.
Nagata, Y.
Lai, S.H.
Lan, M.D.
Noro, Y.
Ozawa, T.C.
Kindo, K.
Matsuo, A.
Takayanagi, S.
關鍵字: Rhodium oxide;Antiferromagnetism;Rare-earth ion;Metamagnetic;transition;Superexchange interaction;ground-state;metamagnetism;dyco2si2;garnet;ions
Project: Journal of Alloys and Compounds
期刊/報告no:: Journal of Alloys and Compounds, Volume 506, Issue 1, Page(s) 27-32.
The crystallographic and magnetic properties of perovskite-type rhodite LnRhO(3) (Ln = rare-earth ions except Ce and Pm) were studied. LnRhO(3) (Ln = La, Eu, Lu) shows paramagnetism with very small susceptibility, suggesting that the Rh3+ ion has no magnetic moment. LnRhO(3) (Ln = Nd, Sm, Gd, Tb, Dy, Ho, Er, Yb) shows antiferromagnetic transition at temperatures between 0.5 and 3.5 K; however, no transition was observed for LnRhO(3) (Ln = Pr, Tm) down to 0.5K. The effective moment mu(eff) agrees with the theoretical moment of free rare-earth ions, indicating the dominant magnetic contribution of rare-earth ions. The Weiss temperature Theta has a strong correlation with the spin value of rare-earth ions, suggesting that the superexchange interaction is a dominant interaction in LnRhO(3). The magnetization of antiferromagnetic samples tends to be saturated above 20-30 kOe, but the moments at 70 kOe are far from the theoretical moments. Antiferromagnetic samples seem to have an intermediate state and require a more intense magnetic field to attain saturation. (c) 2010 Elsevier B.V. All rights reserved.
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2010.07.004
Appears in Collections:期刊論文

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