153Eu and 69,71Ga Zero-Field NMR Study of Antiferromagnetic State in EuGa4
Abstract
We report 153Eu and 69,71Ga NMR under a zero magnetic field on the antiferromagnetic state of EuGa4 with TN≈ 16 K. We have successfully observed a 153Eu zero-field NMR signal with well-resolved nuclear quadrupole splitting in the antiferromagnetic state of EuGa4. 69,71Ga zero-field NMR spectra were also observed below TN. The internal field and nuclear quadrupole frequency are estimated from a simulation of the spectra by the exact diagonalization of the nuclear spin Hamiltonian matrix. The asymmetrically split zero-field NMR spectra were explained by considering a configuration of the magnetic moments of Eu2+ lying in the basal ab-plane. The temperature dependence of the internal field, which is proportional to the sublattice magnetization, can be explained by the Brillouin function with J=S=7/2.
- Publication:
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Journal of the Physical Society of Japan
- Pub Date:
- October 2013
- DOI:
- 10.7566/JPSJ.82.103701
- arXiv:
- arXiv:1309.1260
- Bibcode:
- 2013JPSJ...82j3701Y
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 5 pages, 5 figures, 2 tabeles