Magnetoelectric relaxation in rhombohedral LiNbO3-CoFe2O4

作者：Han Yemei^*; Liu Yueying; Zavalij Peter; Salamanca Riba Lourdes; Cantando Elizabeth; Bergstrom Richard Jr; Li Lingxia; Wuttig Manfred

来源：Applied Physics Letters, 2012, 100(26): 262907.

DOI：10.1063/1.4729933

We demonstrate a magnetoelectric nanocomposite, LiNbO3-CoFe2O4 (LNO-CFO), consisting of rhombohedral R3c LNO and R3m CFO phases. It is characterized by a maximum inverse magnetoelectric coefficient of 6.5 Oe cm.V-1 measured in a 10 6 V/m electric field, and a magnetic field dependent Vogel-Fulcher-like relaxation characterized by a relaxation time tau - tau(0)exp(-Delta H/k(T-m - T-vf(H))), tau(0) - 29.66 s, Delta H -1.06 eV, T-vf(H) represents the magnetic field-dependent Vogel-Fulcher temperature. The activation energy equals the activation energy of oxygen vacancy diffusion in niobate-based crystals. The room temperature electric field-induced magnetization change relaxes as s 18: 05 s.

• 出版日期2012-6-25
• 单位天津大学