Effect of Mn substitution on magnetic behaviour of oxygen defective LaCoO3 perovskite oxide

被引：20

作者：

Sahadevan, Jhelai ^{[1
]}

Radhakrishnan, M. ^{[1
]}

Padmanathan, N. ^{[1
,3
]}

Muthu, S. Esakki ^{[2
]}

Sivaprakash, P. ^{[4
,5
]}

Kadiresan, Mohanrangam ^{[1
]}

机构：

[1] Karpagam Acad Higher Educ, Dept Phys, Coimbatore 641021, Tamil Nadu, India

[2] Karpagam Acad Higher Educ, Ctr Mat Sci, Dept Phys, Coimbatore 641021, Tamil Nadu, India

[3] Univ Coll Cork, Micronano Syst Ctr, Tyndall Natl Inst, Cork, Ireland

[4] Bharathidasan Univ, Ctr High Pressure Res, Sch Phys, Tiruchirappalli 620024, India

[5] Kongunadu Coll Engn & Technol, Dept Phys, Thottiyam 621215, India

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2022年 / 284卷

关键词：

Rhombohedral; Hydrothermal method; Nanorod; Defects; Ferromagnetism; THIN-FILMS; COBALT; REDUCTION; OXIDATION; CHARGE; FE;

D O I：

10.1016/j.mseb.2022.115875

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly activated perovskite materials are desired for magnetic applications. Herein, we report the facile synthesis of LaMnxCo(1-x)O3 (x = 0, 0.05 and 0.1) via a hydrothermal method and investigated their structure stability along with its magnetic features. The as-synthesized and doped samples are crystallized into rhombohedral with the R (3) over barc space group. The clear reconstruction in microstructure is visible from spherical to nanorods after the addition of Mn and this is due to the lattice destruction when Co is replaced by Mn. The magnetically favourable oxidation state of the cobaltite is confirmed by the X-ray photoelectron spectra. It has been shows the mixed (Mn4+/3+) valence state for the doped samples and can be influenced for oxygen defective perovskite formation. Therefore, sustainable ferromagnetic order at low temperature is observed due to the existence of Co3+ at high spin state along with Co2+ state. The isothermal magnetization curve at room temperature reveals the paramagnetic state of the materials. From this work it can be validated that a dopant controlled defective structure can effectively activate the perovskite oxides properties and be able to fabricate similar perovskite system by adopting this process for future magnetic devices applications.

引用

页数：8

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