Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19

H. Mutka; G. Ehlers; C. Payen; D. Bono; J. R. Stewart; P. Fouquet; P. Mendels; J. Y. Mevellec; N. Blanchard; G. Collin

doi:10.1103/PhysRevLett.97.047203

Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19

H. Mutka, G. Ehlers, C. Payen, D. Bono, J. R. Stewart, P. Fouquet, P. Mendels, J. Y. Mevellec, N. Blanchard, G. Collin

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22 Scopus citations

Abstract

A neutron spin-echo investigation of the low temperature spin dynamics in two well-characterized kagomé bilayer compounds SrCr9xGa12-9xO19 (x=0.95, SCGO) and Ba2Sn2ZnCr7xGa10-7xO22 (x=0.97, BSZCGO) reveals two novel features. One is the slowing down of the relaxation rate without critical behavior at Tg, where a macroscopic spin-glass-like freezing occurs. The second is, in SCGO at 4 K (∼ Tg)<T<7K, the relaxation rate activation energy Ea=7±0.4meV, equal to the energy of a phonon mode, pointing out the role of spin-lattice coupling.

Original language	English
Article number	047203
Journal	Physical Review Letters
Volume	97
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.97.047203
State	Published - 2006
Externally published	Yes

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Mutka, H., Ehlers, G., Payen, C., Bono, D., Stewart, J. R., Fouquet, P., Mendels, P., Mevellec, J. Y., Blanchard, N., & Collin, G. (2006). Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19. Physical Review Letters, 97(4), Article 047203. https://doi.org/10.1103/PhysRevLett.97.047203

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title = "Neutron spin-echo investigation of slow spin dynamics in Kagom{\'e}-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19",

abstract = "A neutron spin-echo investigation of the low temperature spin dynamics in two well-characterized kagom{\'e} bilayer compounds SrCr9xGa12-9xO19 (x=0.95, SCGO) and Ba2Sn2ZnCr7xGa10-7xO22 (x=0.97, BSZCGO) reveals two novel features. One is the slowing down of the relaxation rate without critical behavior at Tg, where a macroscopic spin-glass-like freezing occurs. The second is, in SCGO at 4 K (∼ Tg)",

author = "H. Mutka and G. Ehlers and C. Payen and D. Bono and Stewart, {J. R.} and P. Fouquet and P. Mendels and Mevellec, {J. Y.} and N. Blanchard and G. Collin",

year = "2006",

doi = "10.1103/PhysRevLett.97.047203",

language = "English",

volume = "97",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

}

Mutka, H, Ehlers, G, Payen, C, Bono, D, Stewart, JR, Fouquet, P, Mendels, P, Mevellec, JY, Blanchard, N & Collin, G 2006, 'Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19', Physical Review Letters, vol. 97, no. 4, 047203. https://doi.org/10.1103/PhysRevLett.97.047203

TY - JOUR

T1 - Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19

AU - Mutka, H.

AU - Ehlers, G.

AU - Payen, C.

AU - Bono, D.

AU - Stewart, J. R.

AU - Fouquet, P.

AU - Mendels, P.

AU - Mevellec, J. Y.

AU - Blanchard, N.

AU - Collin, G.

PY - 2006

Y1 - 2006

N2 - A neutron spin-echo investigation of the low temperature spin dynamics in two well-characterized kagomé bilayer compounds SrCr9xGa12-9xO19 (x=0.95, SCGO) and Ba2Sn2ZnCr7xGa10-7xO22 (x=0.97, BSZCGO) reveals two novel features. One is the slowing down of the relaxation rate without critical behavior at Tg, where a macroscopic spin-glass-like freezing occurs. The second is, in SCGO at 4 K (∼ Tg)

AB - A neutron spin-echo investigation of the low temperature spin dynamics in two well-characterized kagomé bilayer compounds SrCr9xGa12-9xO19 (x=0.95, SCGO) and Ba2Sn2ZnCr7xGa10-7xO22 (x=0.97, BSZCGO) reveals two novel features. One is the slowing down of the relaxation rate without critical behavior at Tg, where a macroscopic spin-glass-like freezing occurs. The second is, in SCGO at 4 K (∼ Tg)

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DO - 10.1103/PhysRevLett.97.047203

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ER -

Neutron spin-echo investigation of slow spin dynamics in Kagomé-Bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19

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