[19a-E216-1~12] 10.1 新物質・新機能創成（作製・評価技術）

▲ [19a-E216-4] Unravelling magnetic and magnetoelectric phenomena in
electron and hole doped LuFe₂O₄

〇HENA DAS¹ (1.Tokyo Tech)

キーワード：Magnetic and magnetoelectrics, Spin-orbit coupling, Magnetic frustration

LuFe₂O₄hosts various fascinating phenomena, such as charge ordered ferroelectricity, multiferroicity¹, giant magnetocapacitance²and strong magnetic anisotropy³. Recently, synthesis of this system in the close proximity of a strong geometric ferroelectric, LuFeO₃, has led to the observation of near room temperature magnetoelectricity and enhancement in magnetism.⁴These phenomena, though not well understood yet, may have their origin in the self-doped LuFe₂O₄ layer. Such observation indicates the possibility of designing new magnetic and magnetoelectric phenomena in this complex system which holds strongly interacting degrees of freedom, such as geometric frustration, spin-orbit coupling and charge ordering, under electron and hole doping. In this talk, we will discuss the evolution of magnetic phases and magnetoelectric behavior as a function of electron and hole doping in LuFe₂O₄. The focus of our discussion will be to understand this system under the limit of high to low spin-orbit coupling and magnetic frustration.
References:
1. N. Ikeda, H. Ohsumi, K. Ohwada, K. Ishii, T. Inami, K. Kakurai, Y. Murakami, K. Yoshii, S. Mori, Y. Horibe and H. Kitô, Nature 436, 1136–1138 (2005).
2. H. J. Xiang and M.-H. Whangbo, Phys. Rev. Lett. 98, 246403 (2007).
3.K.-T. Ko, H.-J. Noh, J.-Y. Kim, B.-G. Park, J.-H. Park, A. Tanaka, S. B. Kim, C. L. Zhang, and S-W. Cheong, Phys. Rev. Lett. 103, 207202 (2009).
4. J. A. Mundy, C. M. Mrooks, Megan E. Holtz, J. A. Moyer, H. Das, A. F. Rébola, J. T. Heron, J. D. Clarkson, S. M. Disseler, Z. Liu, A. Farhan, R. Held, R. Hovden, E. Padgett, Q. Mao, H. Paik, R. Misra, L. F. Kourkoutis, E. Arenholz, A. scholl, J. A. Borchers, W. D. Ratcliff, R. Ramesh, C. J. Fennie, P. Schiffer, D. A. Muller and D. G. Schlom, Nature 537 , 523–527 (2016).