An approach to achieve layered spintronics material using brownmillerite compound Ca2.5Sr0.5GaMn2O8

Yusuf, S. M. ; Bera, A. K. (2013) An approach to achieve layered spintronics material using brownmillerite compound Ca2.5Sr0.5GaMn2O8 Journal of the Korean Physical Society, 62 (10). pp. 1393-1398. ISSN 0374-4884

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Official URL: https://link.springer.com/article/10.3938%2Fjkps.6...

Related URL: http://dx.doi.org/10.3938/jkps.62.1393

Abstract

Magnetic and magnetotransport properties of the naturally occurring layered compounds Ca2.5−xLaxSr0.5GaMn2O8 (x = 0, 0.05, 0.075, and 0.1) have been reported. We have succeeded to introduce ferromagnetic ordering in the pure antiferromagnetic system Ca2.5Sr0.5GaMn2O8 by varying the ratio between Mn3+ and Mn4+ ions. The experimental results of magnetization, magnetoresistance, and neutron diffraction were interpreted on the basis of an electronic phase separation model, where a formation of ferromagnetic clusters (due to DE interactions) inside the layered antiferromagnetic matrix (due to superexchange interactions) in the La-substituted compounds is proposed. Significantly, the present study shows that the magnetic and electronic properties of the layered system Ca2.5Sr0.5GaMn2O8 can be tuned/optimized by appropriate chemical substitution to achieve a new spintronic material based on naturally occurring layered system for practical applications.

Item Type:Article
Source:Copyright of this article belongs to The Korean Physical Society.
Keywords:Layered Magnetic System; Spin-clusters; Electronic Phase Separation
ID Code:112069
Deposited On:01 Dec 2017 12:10
Last Modified:01 Dec 2017 12:10

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