Zobrazeno 1 - 10
of 10
pro vyhledávání: '"D. A. Jehan"'
Autor:
D.F. McMorrow, D. A. Jehan, M. R. Wells, R A Cowley, K.N. Clausen, R. C. C. Ward, P.P. Swaddling
We present the results of a study of the chemical and magnetic structures of Ho/Y and Ho/Lu superlattices, all grown by molecular beam epitaxy. By combining the results of high-resolution X-ray diffraction with detailed modelling we show that the sup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fcdd5b92269607a1a8ff21e6d838995
https://doi.org/10.1016/0921-4526(93)90116-n
https://doi.org/10.1016/0921-4526(93)90116-n
Autor:
J.A. Simpson, D. F. McMorrow, Doon Gibbs, D. A. Jehan, R A Cowley, T. R. Thurston, M. R. Wells, R.C.C. Ward
The effect of competing crystal-field anisotropies on magnetic order has been investigated in a series of Ho/Er superlattices using neutron and resonant X-ray magnetic diffraction techniques. The neutron diffraction reveals that for temperatures in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77a530c736868fc3ebcefd3de2e3d4be
https://ora.ox.ac.uk/objects/uuid:9829ae5a-9683-4065-8aba-34e9f510db71
https://ora.ox.ac.uk/objects/uuid:9829ae5a-9683-4065-8aba-34e9f510db71
Autor:
Doon Gibbs, T. R. Thurston, J.A. Simpson, R.C.C. Ward, D. F. McMorrow, K.N. Clausen, R A Cowley, M. R. Wells, D. A. Jehan
Publikováno v:
Zeitschrift für Physik B Condensed Matter. 101:35-46
The effect of competing crystal-field anisotropies on magnetic order has been investigated in a series of Ho/Er superlattices using a combination of x-ray and neutron scattering techniques. For temperatures in the interval TN(Er)≤T≤TN(Ho) the Ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::613c2e0efc46987805c6d094f0d75960
https://doi.org/10.1007/s002570050178
https://doi.org/10.1007/s002570050178
Publikováno v:
Journal of Physics: Condensed Matter. 4:8599-8608
The magnetic phase diagram of erbium with a magnetic field applied along the hexagonal c axis has been investigated using high-resolution neutron diffraction. The authors find that there are three distinct ordered phases occupying different regions o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f28cb16aab2efe60865779d8b1c51039
https://doi.org/10.1088/0953-8984/4/44/021
https://doi.org/10.1088/0953-8984/4/44/021
Publikováno v:
Europhysics Letters (EPL). 17:553-558
The magnetic structure of holmium with a magnetic field directed along an easy b direction in the basal plane has been studied using neutron diffraction. In small fields (≤ 0.5 T) spin-slip structures are stabilized at temperatures which in zero fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03279657c875a6f7a8c002e438bd41e9
https://doi.org/10.1209/0295-5075/17/6/013
https://doi.org/10.1209/0295-5075/17/6/013
Publikováno v:
Europhysics Letters (EPL). 15:541-546
The dispersion relationship for spin waves propagating the c-axis in the one–spin-slip phase of holmium at 19.5 K has been measured using a neutron triple-axis spectrometer. A gap in the spin-wave spectrum of approximately 0.6 meV is resolved clear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd237fa172155d2c187c242114590c3b
https://doi.org/10.1209/0295-5075/15/5/012
https://doi.org/10.1209/0295-5075/15/5/012
Autor:
M. R. Wells, J.A. Simpson, D. F. McMorrow, R.C.C. Ward, R A Cowley, D. A. Jehan, K.N. Clausen
Publikováno v:
PHYSICAL REVIEW LETTERS. 73(8)
The effect of competing crystal-field anisotropies on magnetic order has been investigated in a series of Ho/Er superlattices. For temperatures in the interval T(N)(Er) less-than-or-equal-to T less-than-or-equal-to T(N)(Ho) the Ho basal-plane order p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::852c50c617e2b3054795fbd08e0335c4
http://ora.ox.ac.uk/objects/uuid:d2b60d36-b8b6-4e41-9070-d9a1f1f0b3f1
http://ora.ox.ac.uk/objects/uuid:d2b60d36-b8b6-4e41-9070-d9a1f1f0b3f1
Autor:
N. Hagmann, R A Cowley, M. R. Wells, D. F. McMorrow, K.N. Clausen, D. A. Jehan, P.P. Swaddling, R.C.C. Ward
Publikováno v:
EUROPHYSICS LETTERS. 23(7)
The chemical and magnetic structures of a series of Ho/Y superlattices have been studied using X-ray and neutron scattering techniques. The X-ray diffraction results show that the superlattices have a high degree of crystalline order, with sharp inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f00ec4fc3ba96b778b42c7a2abb4196
http://ora.ox.ac.uk/objects/uuid:6ced59aa-6971-47de-b5a2-3d2474b46fa1
http://ora.ox.ac.uk/objects/uuid:6ced59aa-6971-47de-b5a2-3d2474b46fa1
Publikováno v:
Journal of Magnetism and Magnetic Materials. :751-752
Neutron diffraction has been used to re-examine the low-temperature magnetic structure of Ho. Distortions of the mangnetic structures are found due to interactions of trigonal symmetry, both of the one spin-sip and cone phases. The transition between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06daba07534ac80cb66088a079207861
https://doi.org/10.1016/0304-8853(94)01272-5
https://doi.org/10.1016/0304-8853(94)01272-5
Publikováno v:
Physica B: Condensed Matter. :165-166
The inelastic scattering from holmium in its one-spin-slip phase has been measured using a neutron triple-axis spectrometer. Energy gaps in the spin-wave dispersion were observed at points in reciprocal space corresponding to the inverse of the spin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a0b8a00677dccc7a09aefbf0538326d
https://doi.org/10.1016/0921-4526(92)90694-n
https://doi.org/10.1016/0921-4526(92)90694-n