Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-04-08
Physical Review B 84, 144401 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 4 figures. New figure and text added to manuscript
Scientific paper
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.
Dhital Chetan
la Cruz Clarina de
Liu Jian-Miin
Opeil C.
Ren Z. F.
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