Zobrazeno 1 - 10
of 21
pro vyhledávání: '"R. M. Achey"'
Publikováno v:
Ferroelectrics. 337:153-160
We report high resolution 15N NMR measurements of the paraelectric to antiferroelectric phase transition (TN = 216 K) of the model hydrogen-bonded antiferroelectric NH4H2AsO4 (ADA). We specifically examined whether the NH4 + ions undergo a displacive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d07c2d43801d3cd11b91e66616dd6bc
https://doi.org/10.1080/00150190600716556
https://doi.org/10.1080/00150190600716556
Publikováno v:
Ferroelectrics. 337:3-12
The high NMR spectral resolution attained via magic angle spinning (MAS-NMR) on single crystals have enabled us to detect new aspects of mechanism of phase transitions in hydrogen-bonded ferroelectrics and antiferroelectrics. Results are summarized f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cdf0de8cfa88715d5292173bb49d73d
https://doi.org/10.1080/00150190600713876
https://doi.org/10.1080/00150190600713876
Autor:
George Christou, Naresh S. Dalal, N. E. Chakov, Philip L. Kuhns, R. M. Achey, Andrew G. Harter, A. P. Reyes
Publikováno v:
Polyhedron. 24:2346-2349
X-ray structural, magnetization and 55Mn single crystal NMR investigations of Mn12O12 (CH2BrCOO)16(4H2O) · 4CH2Cl2 indicate that this highly symmetric ( I 4 ¯ ) lattice, devoid of hydrogen bonding of the Mn12-framework with the molecules of lattice
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d3752c2891d7adccf091988a6a1a35f
https://doi.org/10.1016/j.poly.2005.03.117
https://doi.org/10.1016/j.poly.2005.03.117
Autor:
Rachel S. Edwards, Stephen Hill, R. M. Achey, Eun Sang Choi, Naresh S. Dalal, J. M. North, D. Zipse, James S. Brooks
Publikováno v:
Journal of Applied Physics. 95:6900-6905
Some newly found properties of the single-molecule magnets Mn12–acetate and Fe8Br8 are summarized: they are semiconductors and their 20 unpaired (S=10) electrons are delocalized not only on the metal ions, but also quite significantly (several perc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a4ed4efb1ecd919a1136d06befd19d3
https://doi.org/10.1063/1.1664451
https://doi.org/10.1063/1.1664451
Publikováno v:
Applied Magnetic Resonance. 27:151-163
High-sensitivity, variable-frequency, high-field electron paramagnetic resonance (EPR) measurements and nuclear magnetic resonance (NMR) measurements are reported for theS=10 single-molecule magnet Fe8Br8. We find that theS=10 state is nested with it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c6bd51ab79f021e2b159269e90758a8
https://doi.org/10.1007/bf03166310
https://doi.org/10.1007/bf03166310
Publikováno v:
International Journal of Modern Physics B. 16:3326-3329
We report high sensitivity, high field/frequency (up to 9 tesla/210 GHz) EPR measurements on the Fe8 and Mn12 single molecule magnets. Oriented single crystal studies, carried out in well defined experimental geometries, enable very accurate determin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d70435837d53a47c85f223caa7da2af
https://doi.org/10.1142/s0217979202014322
https://doi.org/10.1142/s0217979202014322
Publikováno v:
Polyhedron. 20:1441-1445
We use a multi-high-frequency resonant cavity technique to obtain EPR spectra for single crystal samples of the biaxial molecular magnet Fe 8 [(tacn) 6 O 2 (OH) 12 ]Br 8 ·9H 2 O (Fe 8 ). By performing measurements at many closely spaced frequencies,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c457b3ada2bded530365743804dba87
https://doi.org/10.1016/s0277-5387(01)00633-7
https://doi.org/10.1016/s0277-5387(01)00633-7
Autor:
Janez Dolinšek, P. Vonlanthen, H. R. Ott, Robert Blinc, R. M. Achey, Naresh S. Dalal, J. L. Gavilano, Denis Arčon
Publikováno v:
Europhysics Letters (EPL). 42:691-694
The temperature dependence of deuteron NMR spectra of the fully deuterated manganese ion cluster nanomagnet Mn12O12-acetate has been measured. Two sets of deuteron peaks have been observed which both shift towards lower fields with decreasing tempera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aebfbbe8558ff6b12da311a15d708bed
https://doi.org/10.1209/epl/i1998-00307-8
https://doi.org/10.1209/epl/i1998-00307-8
Publikováno v:
Solid State Communications. 121:107-109
13 C NMR measurements have been carried out on 13 CH 3 -labeled Mn 12 O 12 -acetate in both powder and magnetically aligned samples at an applied magnetic field of 8.5 T. The four observed peaks are assignable to the four distinct 13 CH 3 moieties. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::286f71468e3a89354c703a6b216e60d1
https://doi.org/10.1016/s0038-1098(01)00463-x
https://doi.org/10.1016/s0038-1098(01)00463-x