Neer, AJ;
Milam-Guerrero, J;
So, JE;
Melot, BC;
Ross, KA;
Hulvey, Z;
Brown, CM;
... Scanlon, DO; + view all
(2017)
Ising-like antiferromagnetism on the octahedral sublattice of a cobalt-containing garnet and the potential for quantum criticality.
Physical Review B
, 95
(14)
, Article 144419. 10.1103/PhysRevB.95.144419.
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Abstract
In this contribution, we report that CaY2Co2Ge3O12 exhibits an unusual anisotropic and chainlike antiferromagnetic arrangement of spins despite crystallizing in the highly symmetric garnet structure. Using low-temperature powder neutron diffraction and symmetry analysis, we identify a magnetic structure consisting of chainlike motifs oriented along the body diagonals of the cubic unit cell with moments pointing parallel to the chain direction due to the strong Ising character of the Co ions. Antiferromagnetic order sets in below 6 K and exhibits both temperature- and field-induced magnetic transitions at high fields. Combining the results, we present a magnetic phase diagram that suggests CaY2Co2Ge3O12 undergoes a quantum phase transition at low temperatures and moderate fields.
| Type: | Article |
|---|---|
| Title: | Ising-like antiferromagnetism on the octahedral sublattice of a cobalt-containing garnet and the potential for quantum criticality |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.95.144419 |
| Publisher version: | http://doi.org/10.1103/PhysRevB.95.144419 |
| Language: | English |
| Additional information: | © 2017 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, MAGNETIC-STRUCTURE, POINT |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1555167 |
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