Bhattacharyya, A;
Khalyavin, DD;
Krueger, F;
Adroja, DT;
Strydom, AM;
Kockelmann, WA;
Hillier, AD;
(2016)
Incommensurate spin-density-wave antiferromagnetism in CeRu2Al2B.
Physical Review B
, 93
(6)
, Article 060410(R). 10.1103/PhysRevB.93.060410.
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Abstract
The newly discovered Ising-type ferromagnet CeRu2Al2B exhibits an additional phase transition at TN=14.2 K before entering the ferromagnetic ground state at TC=12.8 K. We clarify the nature of this transition through high resolution neutron diffraction measurements. The data reveal the presence of a longitudinal incommensurate spin-density wave (SDW) in the temperature range of TC<T<TN. The propagation vector q∼(0,0,0.148) is nearly temperature independent in this region and discontinuously locks into q=0 at TC. Mean-field calculations of an effective Ising model indicate that the modulated SDW phase is stabilized by a strong competition between ferromagnetic and antiferromagnetic exchange interactions. This makes CeRu2Al2B a particularly attractive model system to study the global phase diagram of ferromagnetic heavy-fermion metals under the influence of magnetic frustration.
| Type: | Article |
|---|---|
| Title: | Incommensurate spin-density-wave antiferromagnetism in CeRu2Al2B |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.93.060410 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevB.93.060410 |
| Language: | English |
| Additional information: | Copyright © 2016 American Physical Society. |
| 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 > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1477394 |
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