Lengsdorf, R.;
Ait-Tahar, M.;
Saxema, S.S.;
Ellerby, M.;
Khomskii, D.I.;
Micklitz, H.;
Lorenz, T.;
(2004)
Pressure-induced insulating state in (La,Sr)CoO_{3}.
Physical Review B
, 69
(14)
p. 140403.
10.1103/PhysRevB.69.140403.
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Abstract
We have investigated the effect of pressure on the electronic, magnetic, and structural properties on a single crystal of conducting, ferromagnet (TC=157 K) La0.82Sr0.18CoO3 located near the boundary of the metal-insulator transition. Contrary to the results reported on related systems, we find a transition from the conducting state to an insulating state and a decrease of TC with increasing pressure while the lattice structure remains unchanged. We show that this unusual behavior is driven by a gradual change of the spin state of Co3+ ions from magnetic intermediate-spin (t2g5eg1;S=1) to a nonmagnetic low-spin (t2g6eg0;S=0) state.
| Type: | Article |
|---|---|
| Title: | Pressure-induced insulating state in (La,Sr)CoO_{3} |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.69.140403 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevB.69.140403 |
| Language: | English |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9474 |
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