Crystalline electric field excitations in CeAgSb2

Shingo Araki, N. Metoki, A. Thamizhavel, Y. Onuki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Neutron scattering experiments have been carried out that reveal the magnetic excitation in the ferromagnet CeAgSb2. Crystalline electric field excitations were observed at 5.2 and 12.5 meV in the paramagnetic state, indicative of the localized nature of the Ce 4f electron. Our analysis concluded that |Jz = ±1/2〉 is the ground state, while the first and second excited levels are mainly due to |±3/2〉 and |±5/2〉, respectively. The observed ferromagnetic moment is in good agreement with the ground-state saturation moment, gJμB Jz ∼ 0.43 μB. The spin wave dispersion is interpreted using the anisotropic Heisenberg model with ferromagnetic exchange interaction up to seventh-nearest neighbours. The spontaneous moment along the c-axis decreases with increasing field perpendicular to the c-axis, and disappears at the critical field Hc, which corresponds to the anomaly which appeared in the magnetization curve.

Original languageEnglish
JournalJournal of Physics Condensed Matter
Volume15
Issue number28
DOIs
Publication statusPublished - Jul 23 2003
Externally publishedYes

Fingerprint

Ground state
Electric fields
Crystalline materials
moments
Spin waves
electric fields
Exchange interactions
Neutron scattering
excitation
Magnetization
ground state
wave dispersion
magnons
Electrons
neutron scattering
anomalies
saturation
magnetization
Experiments
curves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Crystalline electric field excitations in CeAgSb2. / Araki, Shingo; Metoki, N.; Thamizhavel, A.; Onuki, Y.

In: Journal of Physics Condensed Matter, Vol. 15, No. 28, 23.07.2003.

Research output: Contribution to journalArticle

Araki, Shingo ; Metoki, N. ; Thamizhavel, A. ; Onuki, Y. / Crystalline electric field excitations in CeAgSb2. In: Journal of Physics Condensed Matter. 2003 ; Vol. 15, No. 28.
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