| Autor: |
Lhotel, E., Petit, S., Guitteny, S., Florea, O., Hatnean, M. Ciomaga, Colin, C., Ressouche, E., Lees, M. R., Balakrishnan, G. |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 115, 197202 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.115.197202 |
| Popis: |
We present an experimental study of the pyrochlore coumpound Nd2Zr2O7 by means of neutron scattering and magnetization measurements down to 90 mK. The Nd$^{3+}$ magnetic moments exhibit a strong local $\langle$111$\rangle$ Ising anisotropy together with a dipolar-octupolar nature, different from the standard Kramers-doublet studied so far. We show that, despite the positive Curie-Weiss temperature, \ndzr\ undergoes a transition around 285 mK towards an all-in$-$all-out antiferromagnetic state. We establish the $(H,T)$ phase diagram in the three directions of the applied field and reveal a metamagnetic transition around 0.1 T. The strongly reduced ordered magnetic moment as well as the unexpected shape of the magnetization curves demonstrate that Nd2Zr2O7 , is not a standard Ising antiferromagnet. We propose that the peculiar nature of the Nd doublet combined with competing interactions explain these findings. |
| Databáze: |
arXiv |
| Externí odkaz: |
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