scholarly journals Highly dispersive magnons with spin-gap-like features in the frustrated ferromagnetic S=12 chain compound Ca2Y2Cu5O10 detected by inelastic neutron scattering

2019 ◽  
Vol 100 (10) ◽  
Author(s):  
M. Matsuda ◽  
J. Ma ◽  
V. O. Garlea ◽  
T. Ito ◽  
H. Yamaguchi ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap ◽  
Chain Compound

Inelastic neutron scattering study of the spin-gap behavior in CuTeOBr

2005 ◽  
Vol 359-361 ◽  
pp. 1219-1221 ◽  
Author(s):  
S.J. Crowe ◽  
S. Majumdar ◽  
M.R. Lees ◽  
D. McK. Paul ◽  
D.T. Adroja ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap ◽  
Scattering Study ◽  
Neutron Scattering Study

Inelastic neutron scattering study of the spin-gap cuprateβ−AgCuPO4

2007 ◽  
Vol 76 (13) ◽  
Author(s):  
Masashi Hase ◽  
Masaaki Matsuda ◽  
Kazuhisa Kakurai ◽  
Kiyoshi Ozawa ◽  
Hideaki Kitazawa ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap ◽  
Scattering Study ◽  
Neutron Scattering Study

Spin gap inCeFe4Sb12studied by heat capacity and inelastic neutron scattering

2007 ◽  
Vol 76 (17) ◽  
Author(s):  
R. Viennois ◽  
L. Girard ◽  
L. C. Chapon ◽  
D. T. Adroja ◽  
R. I. Bewley ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap

scholarly journals Inelastic Neutron Scattering Investigations of an Anisotropic Hybridization Gap in the Kondo Insulators: CeT2Al10 (T=Fe, Ru and Os)

2016 ◽  
Vol 257 ◽  
pp. 11-25 ◽  
Author(s):  
Devashibhai T. Adroja ◽  
Y. Muro ◽  
Toshiro Takabatake ◽  
M.D. Le ◽  
H.C. Walker ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Spin Wave ◽  
Inelastic Neutron Scattering ◽  
Wave Spectrum ◽  
Magnetic Ordering ◽  
Inelastic Neutron ◽  
Spin Gap ◽  
Kondo Insulators ◽  
Anisotropic Exchange ◽  
Magnetic Ordering Temperature

The recent discovery of topological Kondo insulating behaviour in strongly correlated electron systems has generated considerable interest in Kondo insulators both experimentally and theoretically. The Kondo semiconductors CeT2Al10 (T=Fe, Ru and Os) possessing a c-f hybridization gap have received considerable attention recently because of the unexpected high magnetic ordering temperature of CeRu2Al10 (TN=27 K) and CeOs2Al10 (TN=28.5 K) and the Kondo insulating behaviour observed in the valence fluctuating compound CeFe2Al10 with a paramagnetic ground state down to 50 mK. We are investigating this family of compounds, both in polycrystalline and single crystal form, using inelastic neutron scattering to understand the role of anisotropic c-f hybridization on the spin gap formation as well as on their magnetic properties. We have observed a clear sign of a spin gap in all three compounds from our polycrystalline study as well as the existence of a spin gap above the magnetic ordering temperature in T=Ru and Os. Our inelastic neutron scattering studies on single crystals of CeRu2Al10 and CeOs2Al10 revealed dispersive gapped spin wave excitations below TN. Analysis of the spin wave spectrum reveals the presence of strong anisotropic exchange, along the c-axis (or z-axis) stronger than in the ab-plane. These anisotropic exchange interactions force the magnetic moment to align along the c-axis, competing with the single ion crystal field anisotropy, which prefers moments along the a-axis. In the paramagnetic state (below 50 K) of the Kondo insulator CeFe2Al10, we have also observed dispersive gapped magnetic excitations which transform into quasi-elastic scattering on heating to 100 K. We will discuss the origin of the anisotropic hybridization gap in CeFe2Al10 based on theoretical models of heavy-fermion semiconductors.

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

1992 ◽  
Vol 2 (10) ◽  
pp. 1929-1939 ◽  
Author(s):  
Mariette Barthes ◽  
Juegen Eckert ◽  
Susanna W. Johnson ◽  
Jacques Moret ◽  
Basil I. Swanson ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Modes

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal

1992 ◽  
Vol 2 (2) ◽  
pp. 125-130 ◽  
Author(s):  
M. Quilichini ◽  
B. Hennion ◽  
G. Heger ◽  
S. Lefebvre ◽  
A. Quivy
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Scattering Study ◽  
Neutron Scattering Study
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