Neutron scattering study on spin correlations and fluctuations in the transition-metal-based magnetic quasicrystal Zn-Fe-Sc

Taku J Sato; Shiro Kashimoto; Chihiro Masuda; Takahiro Onimaru; Isao Nakanowatari; Kazuki Iida; Rei Morinaga; Tsutomu Ishimasa

doi:10.1103/PhysRevB.77.014437

Neutron scattering study on spin correlations and fluctuations in the transition-metal-based magnetic quasicrystal Zn-Fe-Sc

Materials Science 2009-11-13 v1

Authors: Taku J Sato , Shiro Kashimoto , Chihiro Masuda , Takahiro Onimaru , Isao Nakanowatari , Kazuki Iida , Rei Morinaga , Tsutomu Ishimasa

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Spin correlations and fluctuations in the 3d-transition-metal-based icosahedral quasicrystal Zn-Fe-Sc have been investigated by neutron scattering using polycrystalline samples. Magnetic diffuse scattering has been observed in the elastic experiment at low temperatures, indicating development of static short-range-spin correlations. In addition, the inelastic scattering experiment detects a $Q$ -independent quasielastic signal ascribed to single-site relaxational spin fluctuations. Above the macroscopic freezing temperature $T_{\rm f} \simeq 7$ K, the spin relaxation rate shows Arrhenius-type behavior, indicating thermally activated relaxation process. In contrast, the relaxation rate remains finite even at the lowest temperature, suggesting a certain quantum origin for the spin fluctuations below $T_{\rm f}$ .

Keywords

neutron scattering spin correlations quasicrystal magnetic diffuse scattering quasielastic signal Arrhenius behavior spin relaxation

Cite

@article{arxiv.0712.2635,
  title  = {Neutron scattering study on spin correlations and fluctuations in the transition-metal-based magnetic quasicrystal Zn-Fe-Sc},
  author = {Taku J Sato and Shiro Kashimoto and Chihiro Masuda and Takahiro Onimaru and Isao Nakanowatari and Kazuki Iida and Rei Morinaga and Tsutomu Ishimasa},
  journal= {arXiv preprint arXiv:0712.2635},
  year   = {2009}
}

Comments

To be published in Phys. Rev. B

Neutron scattering study on spin correlations and fluctuations in the transition-metal-based magnetic quasicrystal Zn-Fe-Sc

Abstract

Keywords

Cite

Comments

Related papers