Tailoring the ground state of the ferrimagnet La2Ni(Ni1/3Sb2/3)O6

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:346

Article

Franco, D. G.^1,2  Carbonio, R. E.²  Kaul, E. E.^1,3,4  Nieva, G.^1,3,4 

[1] Ctr Atom Bariloche CNEA, Lab Bajas Temp, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Nacl Cordoba, Depto Fis Quim, Fac Ciencias Quim, INFIQC CONICET, RA-5000 Cordoba, Argentina

[3] CNEA, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Univ Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

关键词: Ferrimagnetic;    Double perovskite;    Magnetic frustration;    Superexchange and super-superexchange interaction;    Magnetic oxide;   

DOI  :  10.1016/j.jmmm.2013.07.017

来源: Elsevier

【 摘 要 】

We report on the magnetic and structural properties of La2Ni(Ni1/3Sb2/3)O-6 in polycrystal, single crystal and thin film samples. We found that this material is a ferrimagnet (T-c approximate to 100 K) which possesses a very distinctive and uncommon feature in its virgin curve of the hysteresis loops. We observe that bellow 20 K it lies outside the hysteresis cycle, and this feature was found to be an indication of a microscopically irreversible process possibly involving the interplay of competing antiferromagnetic interactions that hinder the initial movement of domain walls. This initial magnetic state is overcome by applying a temperature dependent characteristic field. Above this field, an isothermal magnetic demagnetization of the samples yield a ground state different from the initial thermally demagnetized one. (c) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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