Physics and Astronomy
Physical Review B
American Physical Society
The glassy response of ultrathin films of La0.8Ca0.2MnO3 in the mixed phase to external magnetic and gated electro-static fields have been studied at low temperatures. The response of the resistance to external fields provides direct evidence for a hierarchical energy landscape, with strong cross-couplings between spin and charge. Magnetic coercivity measurements indicate that strong magnetic disorder accompanies the mixed phase in these films. This magnetic disorder, and the resultant coercivity, can be decreased by cooling in a large magnetic field or by electrostatic gating.
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Bhattacharya, A., Melissa Eblen-Zayas,, N. E. Staley, A. L. Kobrinskii, and A. M. Goldman., "Low-temperature glassy response of ultrathin La0.8ca0.2Mn03 films to electric and magnetic fields". Physical Review B, vol. 72, no. 132406, 2005. Available at: https://doi.org/10.1103/PhysRevB.72.132406. . [Online]. Accessed via Faculty Work. Physics and Astronomy. Carleton Digital Commons. https://digitalcommons.carleton.edu/phys_faculty/9
The definitive version is available at https://doi.org/10.1103/PhysRevB.72.132406