Padhan, Prahallad ; Budhani, R. C. (2005) Giant quenching and mobile carrier assisted recovery of ordered moments in La0.7Ca0.3MnO3/Er0.7Sr0.3MnO3 and La0.7Ca0.3MnO3/LaNiO3 superlattices Physical Review B: Condensed Matter and Materials Physics, 71 (14). 144415_1-144415_5. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v71/i14/e144415
Related URL: http://dx.doi.org/10.1103/PhysRevB.71.144415
Abstract
We report measurements of magnetic ordering temperature, magnetic moment, and resistivity of La0.7Ca0.3MnO3/LaNiO3 and La0.7Ca0.3MnO3/Er0.7Sr0.3MnO3, thin film superlattices. The ordered moment per Mn ion of the ferromagnetic layers undergoes a giant quenching as the insulating spacer layer (Er0.7Sr0.3MnO3) thickness is increased. We attribute the quenching to random pinning of the t2g spins of Mn ions in a disordered interfacial zone of length scale λ c. The nonzero quenching followed by full recovery seen at large n in superlattices with the metallic spacer (LaNiO3), suggest a mobile-carrier-assisted depinning of the t2g spins in the disordered zone.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 87785 |
| Deposited On: | 22 Mar 2012 07:47 |
| Last Modified: | 22 Mar 2012 07:47 |
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