Neutron scattering study of magnetic phase separation in nanocrystalline La$_{5/8}$Ca$_{3/8}$MnO$_3$
| Autor: | Dhital, Chetan, de la Cruz, Clarina, Opeil, C., Treat, A., Wang, K. F., Liu, J. -M., Ren, Z. F., Wilson, Stephen D. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Physical Review B 84, 144401 (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.84.144401 |
| Popis: | We demonstrate that magnetic phase separation and competing spin order in the colossal magnetoresistive (CMR) manganites can be directly explored via tuning strain in bulk samples of nanocrystalline La$_{1-x}$Ca$_x$MnO$_3$. Our results show that strain can be reversibly frozen into the lattice in order to stabilize coexisting antiferromagnetic domains within the nominally ferromagnetic metallic state of La$_{5/8}$Ca$_{3/8}$MnO$_3$. The measurement of tunable phase separation via magnetic neutron powder diffraction presents a direct route of exploring the correlated spin properties of phase separated charge/magnetic order in highly strained CMR materials and opens a potential avenue for realizing intergrain spin tunnel junction networks with enhanced CMR behavior in a chemically homogeneous material. Comment: 6 pages, 4 figures. New figure and text added to manuscript |
| Databáze: | arXiv |
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