Tuning of multi-magnetic phase and exchange bias effect by antisite disorder in Ca-doped La2CoMnO6 double perovskites. (3rd May 2021)

• Record Type: Journal Article
• Authors: Sahoo, R C; Das, Sananda; Daw, Debottam; Singh, Ripandeep; Das, A; Nath, T K
• Is Part Of: Journal of physics. Volume 33:Number 21(2021)
• Publication Date: 2021-05-03
• Subjects: exchange bias -- multiple magnetic phases -- antisite disorder -- magnetism -- double perovskites; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/abead0
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The exchange bias effect at the magnetic interfaces and multi-magnetic phases strongly depends on the antisite disorder (ASD) driven spin configuration in the double perovskite systems. The percentage of ASD in double perovskites is extensively accepted as a key for designing diverse new nanospintronics with tailored functionalities. In this regards, we have investigated such ASD driven phenomena in Ca 2+ doped bulk and polycrystalline La2− x Ca x CoMnO6 (0 ⩽ x ⩽ 1) series of samples. The structural and Raman studies provide evidence of an increase in the disorder due to the increment of Ca concentration in the parent compound ( x = 0). The enhancement of disorder in the doped system induces various magnetic orderings, magnetic frustration and cluster glass-like behavior, which have been confirmed from AC and DC magnetic studies and neutron diffraction studies. As a result, significantly large exchange bias effects, namely zero-field cooled (spontaneous) and field-cooled (conventional) exchange bias, are found. These results reveal the tuning of ASD by doping, which plays an active role in the spin configuration at the magnetic interfaces.