Temperature dependence of the electron magnetic resonance linewidth in the neighborhood of a phase transition and exchange interaction in KMnF3

1976 ◽  
Vol 19 (9) ◽  
pp. 1200-1201 ◽  
Author(s):  
V. V. Velichko ◽  
A. Yu. Gusev
Keyword(s):  
Phase Transition ◽  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Exchange Interaction ◽  
Electron Magnetic Resonance ◽  
Resonance Linewidth

Temperature dependence of electron magnetic resonance and magnetization in NiO nanorods

2004 ◽  
Vol 129 (11) ◽  
pp. 721-725 ◽  
Author(s):  
M.S. Seehra ◽  
P. Dutta ◽  
H. Shim ◽  
A. Manivannan
Keyword(s):  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Electron Magnetic Resonance

scholarly journals Physical studies on phosphonium phosphatidylcholine. A unique [31P]phosphorus nuclear-magnetic-resonance probe for model and biological membranes

1975 ◽  
Vol 151 (3) ◽  
pp. 555-560 ◽  
Author(s):  
E Sim ◽  
P R Cullis ◽  
R E Richards
Keyword(s):  
Phase Transition ◽  
Nuclear Magnetic Resonance ◽  
Transition Temperature ◽  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Phase Transition Temperature ◽  
Shift Reagent ◽  
Scanning Calorimetry ◽  
Distearoyl Phosphatidylcholine ◽  
Nuclear Magnetic

1. Distearoyl phosphatidylcholine and the phosphonium analogue, in which the nitrogen atom is replaced by phosphorus, show similar gel-liquid crystalline transition temperatures as detected by differential scanning calorimetry. 2. The temperature-dependence of the 31P n.m.r. (nuclear-magnetic-resonance) linewidths of the phosphate resonances of sonicated vesicles of distearoyl phosphatidylcholine and the phosphonium analogue are similar. Below the phase-transition temperature the linewidths decrease as the temperature is raised. Above the phase-transition temperature the phosphate resonances are relatively temperature-independent. The phosphonium 31P n.m.r. signal exhibits the same pattern of temperature-dependence. 3. The 31P n.m.r. phosphonium resonance is sensitive to the paramagnetic shift reagent, K3Fe(CN)6. Use of K3Fe(CN)6, together with Nd(NO3)3, enabled the determination of the trans-bilayer distribution of egg-yolk phosphatidylcholine and its phosphonium analogue in co-sonicated vesicles. Both are distributed comparably across the bilayer of the vesicles. 4. The phosphonium 31P n.m.r. signal is much sharper than the corresponding phosphate resonance in both sonicated and unsonicated dispersions of the phosphatidylcholine analogue. 5. The properties of the phosphonium analogue of phosphatidylcholine are discussed in terms of its suitability as a probe of membrane structure.

NMR investigation of spin transfer to H in K2CuCl4∙2H2O

1983 ◽  
Vol 61 (12) ◽  
pp. 1627-1632 ◽  
Author(s):  
Tae Jong Han ◽  
Sung Ho Choh
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Hyperfine Interaction ◽  
Temperature Dependence ◽  
Exchange Interaction ◽  
Room Temperature ◽  
Copper Ion ◽  
Spin Transfer ◽  
Temperature Dependent ◽  
Super Exchange Interaction

Nuclear magnetic resonance of 1H in K2CuCl4∙2H2O has been measured with frequencies of 3 to 35 MHz at room temperature, 163, and 77 K. The fractional spin transfer from the copper ion to hydrogen due to the transferred hyperfine interaction is analyzed: 0.19 ± 0.03% at 300 K, 0.23 ± 0.02% at 163 K, and 0.27 ± 0.02% at 77 K, showing that the spin transfer is temperature dependent. This temperature dependence is closely associated with the unusually strong temperature dependent super-exchange interaction between Cu2+ ions in this crystal.

scholarly journals Temperature dependence of electron magnetic resonance spectra of iron oxide nanoparticles mineralized inListeria innocuaprotein cages

2012 ◽  
Vol 112 (8) ◽  
pp. 084701 ◽  
Author(s):  
Robert J. Usselman ◽  
Stephen E. Russek ◽  
Michael T. Klem ◽  
Mark A. Allen ◽  
Trevor Douglas ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Iron Oxide Nanoparticles ◽  
Electron Magnetic Resonance ◽  
Oxide Nanoparticles ◽  
Magnetic Resonance Spectra
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