$^1$H nuclear magnetic resonance (NMR) experiments have been performed in the temperature range of 30 -- 300 K at 7 T to investigate the phase-dependent nature of the dynamic network of hydrogen bonds in a ((NH₄)₃H(SO₄)₂ single crystal. The cr...
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https://www.riss.kr/link?id=A104336385
S. H. Choi (Konkuk Univ.) ; Moohee Lee (Konkuk Univ.) ; Ae Ran Lim (Jeonju Univ.) ; K. S. Han (Konkuk Univ.) ; S. K. Kwon (Konkuk Univ.) ; S. K. Nam (Konkuk Univ.)
2008
English
KCI등재,SCI,SCIE,SCOPUS
학술저널
427-430(4쪽)
3
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
$^1$H nuclear magnetic resonance (NMR) experiments have been performed in the temperature range of 30 -- 300 K at 7 T to investigate the phase-dependent nature of the dynamic network of hydrogen bonds in a ((NH₄)₃H(SO₄)₂ single crystal. The cr...
$^1$H nuclear magnetic resonance (NMR) experiments have been
performed in the temperature range of 30 -- 300 K at 7 T to
investigate the phase-dependent nature of the dynamic network of
hydrogen bonds in a ((NH₄)₃H(SO₄)₂ single crystal. The
crystal has six phases, which are ferroelectric, antiferroelectric,
incommensurate, antiferroelectric, ferroelastic, and superionic with
the respective transition temperatures of 63, 133, 139, 256 and 413
K. The spin-lattice relaxation time, T₁, of ¹H NMR is similar
for the ammonium protons and the hydrogen-bond protons over the
entire range of experimental temperatures. The T₁, of ¹H NMR
gradually decreases down to 120 K and starts to steeply increase
below 100 K. Then, the T₁ shows an abrupt decrease below 68 K
with a sharp minimum at 63 K, where the ferroelectric transition
occurs. The ¹H NMR spectrum shifts to the high-frequency side at
temperatures below 63 K due to the ferroelectric phase transition.
This behavior of the T₁ and the spectrum confirms a dramatic
change in the dynamics of hydrogen bonds associated with the
ferroelectric phase transition at 63 K.
다국어 초록 (Multilingual Abstract)
$^1$H nuclear magnetic resonance (NMR) experiments have been performed in the temperature range of 30 -- 300 K at 7 T to investigate the phase-dependent nature of the dynamic network of hydrogen bonds in a ((NH₄)₃H(SO₄)₂ single crystal. The...
$^1$H nuclear magnetic resonance (NMR) experiments have been
performed in the temperature range of 30 -- 300 K at 7 T to
investigate the phase-dependent nature of the dynamic network of
hydrogen bonds in a ((NH₄)₃H(SO₄)₂ single crystal. The
crystal has six phases, which are ferroelectric, antiferroelectric,
incommensurate, antiferroelectric, ferroelastic, and superionic with
the respective transition temperatures of 63, 133, 139, 256 and 413
K. The spin-lattice relaxation time, T₁, of ¹H NMR is similar
for the ammonium protons and the hydrogen-bond protons over the
entire range of experimental temperatures. The T₁, of ¹H NMR
gradually decreases down to 120 K and starts to steeply increase
below 100 K. Then, the T₁ shows an abrupt decrease below 68 K
with a sharp minimum at 63 K, where the ferroelectric transition
occurs. The ¹H NMR spectrum shifts to the high-frequency side at
temperatures below 63 K due to the ferroelectric phase transition.
This behavior of the T₁ and the spectrum confirms a dramatic
change in the dynamics of hydrogen bonds associated with the
ferroelectric phase transition at 63 K.
참고문헌 (Reference)
1 M. Kamoun, 9 : 247-, 1987
2 L. S. Smirnov, 43 : 117-, 2001
3 R. H. Chen, 37 : 141-, 1992
4 K. Sooryanarayana, 58 : 263-, 1996
5 V. G. Ponomareva, 145 : 205-, 2001
6 A. R. Lim, 18 : 6759-, 2006
7 S. Suzuki, 34 : 732-, 1978
8 P. A. Leclaire, 41 : 209-, 1985
9 T. Fukami, 35 : 2253-, 1996
10 I. Tamura, 60 : 1411-, 1999
1 M. Kamoun, 9 : 247-, 1987
2 L. S. Smirnov, 43 : 117-, 2001
3 R. H. Chen, 37 : 141-, 1992
4 K. Sooryanarayana, 58 : 263-, 1996
5 V. G. Ponomareva, 145 : 205-, 2001
6 A. R. Lim, 18 : 6759-, 2006
7 S. Suzuki, 34 : 732-, 1978
8 P. A. Leclaire, 41 : 209-, 1985
9 T. Fukami, 35 : 2253-, 1996
10 I. Tamura, 60 : 1411-, 1999
11 M. Kamoun, 44 : 471-, 1988
12 K. Gesi, 33 : 479-, 1976
13 K. Gesi, 43 : 1941-, 1977
14 M. Fujimoto, 46 : 227-, 1983
15 T. Fukami, 98 : 105-, 1997
16 P. M. Dominiak, 42 : 1590-, 2003
17 F. Fillaux, 154 : 135-, 1991
18 Junko Hatori, "Spin-Lattice Relaxation in Pyridazine Perchlorate (C4H4N2)HClO4" 한국물리학회 51 (51): 832-835, 2007
19 E. Fukushima, "Experimental Pulse NMR" Addison-Wesley 1981
20 B. J. Suh, "Antisite Disorder and Superparamagnetism in Heusler-like Fe$_2$VAl: A $^{51}$V and $^{27}$Al NMR Study" 한국물리학회 48 (48): 288-292, 2006
Frequency-Entrainment Measures in Coupled-Oscillator Systems
Diluted Ferromagnetic Semiconductor in a Cr-Based MnTe Thin Film
Response of Charged Hadrons to a Coulomb Potential in Heavy-Ion Collisions at the RHIC
학술지 이력
연월일 | 이력구분 | 이력상세 | 등재구분 |
---|---|---|---|
2023 | 평가예정 | 해외DB학술지평가 신청대상 (해외등재 학술지 평가) | |
2020-01-01 | 평가 | 등재학술지 유지 (해외등재 학술지 평가) | ![]() |
2011-01-01 | 평가 | 등재학술지 유지 (등재유지) | ![]() |
2009-01-01 | 평가 | 등재학술지 유지 (등재유지) | ![]() |
2007-01-01 | 평가 | SCI 등재 (등재유지) | ![]() |
2005-01-01 | 평가 | 등재학술지 유지 (등재유지) | ![]() |
2002-07-01 | 평가 | 등재학술지 선정 (등재후보2차) | ![]() |
2000-01-01 | 평가 | 등재후보학술지 선정 (신규평가) | ![]() |
학술지 인용정보
기준연도 | WOS-KCI 통합IF(2년) | KCIF(2년) | KCIF(3년) |
---|---|---|---|
2016 | 0.47 | 0.15 | 0.31 |
KCIF(4년) | KCIF(5년) | 중심성지수(3년) | 즉시성지수 |
0.26 | 0.2 | 0.26 | 0.03 |