THE MAGNETIC AND ELECTRICAL PROPERTIES OF RARE-EARTH Sm3+ SUBSTITUTED Bi1.7Pb0.3Sr2Ca2-xSmxCu3O12 SYSTEM

2005 ◽  
Vol 19 (06) ◽  
pp. 331-340 ◽  
Author(s):  
AHMET EKİCİBİL ◽  
ATILLA COŞKUN ◽  
BEKIR ÖZÇELİK ◽  
KERIM KIYMAÇ
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Hole Concentration ◽  
Superconducting Properties ◽  
Rare Earth Ion ◽  
Different Temperatures ◽  
Ion Substitution ◽  
Trivalent Rare Earth ◽  
Increasing Temperature ◽  
Magnetic Nature

In the present work, the magnetic properties of high-Tc Bi 1.7 Pb 0.3 Sr 2 Ca 2-x Sm x Cu 3 O 12 system (x = 0.03) have been investigated, for different temperatures below Tc. Substitution of Sm 3+ for Ca 2+ is found to change the superconducting properties of the system, despite the weak paramagnetic nature of the Sm 3+ ion. The dc magnetization measurements performed on the compound reveal that the superconducting regions decrease with increasing temperature and magnetic field. The results are explained on the basis of a possible reduction of hole concentration with trivalent rare-earth ion substitution, and also on the basis of the magnetic nature of the substituted Sm 3+ ions.

scholarly journals Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3717
Author(s):  
Jae-Young Jung ◽  
Soung-Soo Yi ◽  
Dong-Hyun Hwang ◽  
Chang-Sik Son
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Sintering Temperature ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
Rare Earth Ions ◽  
Precipitation Method ◽  
Rare Earth Ion ◽  
Co Precipitation ◽  
Quenching Phenomenon

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO4). Sintered MnWO4 showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy3+) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO4 based on these sintering temperature conditions. As the amount of rare earth ions was changed, the magnetic and luminescent characteristics were enhanced; however, after 0.1 mol.%, the luminescent characteristics decreased due to the concentration quenching phenomenon. In addition, a composite was prepared by mixing MnWO4 powder, with enhanced magnetism and luminescence properties due to the addition of dysprosium, with epoxy. To one of the two prepared composites a magnetic field was applied to induce alignment of the MnWO4 particles. Aligned particles showed stronger luminescence than the composite sample prepared with unsorted particles. As a result of this, it was suggested that it can be used as phosphor and a photosensitizer by utilizing the magnetic and luminescent properties of the synthesized MnWO4 powder with the addition of rare earth ions.

High-Trivalent Rare Earth Ion Conduction in Solids Based on NASICON-Type Phosphate

2008 ◽  
Vol 81 (4) ◽  
pp. 521-524 ◽  
Author(s):  
Yasunori Hasegawa ◽  
Shinji Tamura ◽  
Mineo Sato ◽  
Nobuhito Imanaka
Keyword(s):  
Rare Earth ◽  
Rare Earth Ion ◽  
Ion Conduction ◽  
Nasicon Type ◽  
Trivalent Rare Earth

Influence of magnetic rare-earth ion substitution on the magnetic susceptibility of high-Tcsuperconductors

1987 ◽  
Vol 36 (7) ◽  
pp. 3603-3607 ◽  
Author(s):  
F. Zuo ◽  
B. R. Patton ◽  
D. L. Cox ◽  
S. I. Lee ◽  
Y. Song ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Rare Earth Ion ◽  
Ion Substitution ◽  
Magnetic Rare Earth

Up-conversion luminescence of trivalent-rare-earth ion-doped LnTaO4 (Ln=Y, Gd, La)

2008 ◽  
Vol 62 (16) ◽  
pp. 2500-2502 ◽  
Author(s):  
Tao Pang ◽  
Wang-he Cao ◽  
Yao Fu ◽  
Xi-xian Luo
Keyword(s):  
Rare Earth ◽  
Rare Earth Ion ◽  
Trivalent Rare Earth

Trivalent rare earth ion conduction in the scandium tungstate type structure

2000 ◽  
Vol 303-304 ◽  
pp. 303-306 ◽  
Author(s):  
N Imanaka ◽  
S Tamura ◽  
Y Kobayashi ◽  
Y Okazaki ◽  
M Hiraiwa ◽  
...  
Keyword(s):  
Rare Earth ◽  
Type Structure ◽  
Rare Earth Ion ◽  
Ion Conduction ◽  
Trivalent Rare Earth

Effects of Rare Earths and Yttrium on Striated Muscle and the Neuromuscular Junction

1972 ◽  
Vol 50 (6) ◽  
pp. 603-611 ◽  
Author(s):  
John M. Bowen
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Time Course ◽  
Striated Muscle ◽  
Ringer Solution ◽  
Solution Ph ◽  
Rare Earth Ion ◽  
End Plate ◽  
Trivalent Rare Earth ◽  
Frog Sartorius

Effects of several rare earths and yttrium on isolated frog sartorius muscles were investigated. Lanthanum (La), praseodymium, neodymium (Nd), samarium, gadolinium, dysprosium, erbium, thulium, ytterbium, and yttrium (Y) inhibited twitch tension of indirectly stimulated preparations. Concentrations required to reduce twitch tension to 50% of control tension in 15 min ranged between 0.52 mM and 1.10 mM (Ringer solution; pH 6.0). Similar concentrations (La, Nd, and Y) also inhibited twitch tension of directly stimulated, curarized preparations. A relationship between effect on twitch tension and atomic number was not found. La (0.3 mM) and Y (0.3 mM) reduced the amplitude, but did not appear to alter the time course, of extracellularly recorded end-plate potentials (E.P.P.'s). Amplitudes of intracellularly recorded E.P.P.'s were reduced by La (0.0125–0.05 mM) and Y (0.0125 and 0.025 mM). Effect on quantal contents of E.P.P.'s indicated that the principal action of both agents was an inhibition of transmitter release. La (0.025 and 0.05 mM) and Y (0.05 mM) significantly increased the frequency of miniature end-plate potentials. It is concluded that the prejunctional membrane does not differentiate significantly between the action of the trivalent rare earth ion lanthanum and the action of the trivalent rare-earth-like ion yttrium.

ChemInform Abstract: Trivalent Rare Earth Ion Conduction in the Rare Earth Tungstates with the Sc2(WO4)3-Type Structure.

ChemInform ◽  
2010 ◽  
Vol 29 (39) ◽  
pp. no-no
Author(s):  
N. IMANAKA ◽  
Y. KOBAYASHI ◽  
K. FUJIWARA ◽  
T. ASANO ◽  
Y. OKAZAKI ◽  
...  
Keyword(s):  
Rare Earth ◽  
Type Structure ◽  
Rare Earth Ion ◽  
Ion Conduction ◽  
Trivalent Rare Earth ◽  
The Rare Earth
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