PIRSA:17060042 Conference Condensed Matter

DOI10.48660/17060042

Conference/School: International Workshop on Quantum Spin Ice

Lhotel, E. (2017). Magnetic fragmentation and quantum effects in Nd2Zr2O7. Perimeter Institute. https://pirsa.org/17060042

Lhotel, Elsa. Magnetic fragmentation and quantum effects in Nd2Zr2O7. Perimeter Institute, Jun. 08, 2017, https://pirsa.org/17060042 

@misc{ pirsa_PIRSA:17060042,
  doi = {10.48660/17060042},
  url = {https://pirsa.org/17060042},
  author = {Lhotel, Elsa},
  keywords = {Condensed Matter},
  language = {en},
  title = {Magnetic fragmentation and quantum effects in Nd2Zr2O7},
  publisher = {Perimeter Institute},
  year = {2017},
  month = {jun},
  note = {PIRSA:17060042 see, \url{https://pirsa.org}}
}

Abstract

By means of neutron scattering measurements, we have observed magnetic fragmentation in the pyrochlore oxide Nd2Zr2O7, in which the Nd3+ ion has a strong Ising character and ferromagnetic interactions are inferred from the positive Curie-Weiss temperature θCW = 195 mK [2]. In this system, an “all in - all out” ordered state, with a reduced magnetic moment, coexists below TN = 285 mK with a fluctuating state [3]. Experimentally, the fragmentation manifests itself via the superposition of magnetic Bragg peaks, characteristic of the antiferromagnetic ordered phase, and a pinch point pattern, characteristic of the Coulomb phase [4]. The finite energy of the pinch point pattern and the dispersive modes that emerge from it, points out the quantum origin of the fragmentation in Nd2Zr2O7 [5], which comes from the very peculiar “dipolar-octopolar” nature of the Kramers Nd3+ doublet.

Resources

Next talk

Related Talks