Large Coupled Magnetoresponses in EuNbO2N

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• 作者：A. Belé ; n Jorge ; Judith Oró ; -Solé ; Ana M. Bea ; Nandang Mufti ; Thomas T. M. Palstra ; Jennifer A. Rodgers ; J. Paul Attfield ; Amparo Fuertes
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：September 24, 2008
• 年：2008
• 卷：130
• 期：38
• 页码：12572-12573
• 全文大小：167K
• 年卷期：v.130,no.38(September 24, 2008)
• ISSN：1520-5126

文摘

We have explored a new strategy to discover materials with large resistive or capacitive responses to magnetic fields by synthesizing EuMO₂N (M = Nb, Ta) perovskites that combine ferromagnetic order of S = ⁷/₂ Eu²⁺ spins with possible off-center distortions of the d⁰ M⁵⁺ cations enhanced by covalent bonding to N. EuNbO₂N shows colossal magnetoresistances at low temperatures and a giant magnetocapacitance. However, the latter response originates from a microstructural effect rather than an intrinsic multiferroism.