MAGNETISATION AND MAGNETORESISTANCE OF Ho2Co17

1993 ◽  
Vol 07 (01n03) ◽  
pp. 802-805
Author(s):  
F.E. KAYZEL ◽  
R.J. RADWAŃSKI ◽  
L.T. TAI ◽  
K. BAKKER ◽  
J.J.M. FRANSE
Keyword(s):  
Magnetic Structure ◽  
Magnetization Curve ◽  
High Field ◽  
Spin Exchange ◽  
Exchange Parameter ◽  
Hexagonal Cell ◽  
Abrupt Decrease ◽  
Single Crystalline ◽  
Easy Direction ◽  
Transition Field

High field magnetisation measurements up to 38 T have been performed on a newly grown single-crystalline Ho2Co17 sample along the main crystallographic directions of the hexagonal cell. The magnetization curve along the easy direction (b-axis) exhibits a metamagnetic-like transition at 23.6 T whereas for the a-axis a similar transition occurs at 31.4 T. The transitions are extremely sharp - much sharper than in previously grown crystals. The transitions are understood as a moment-flip transition associated with the formation of a non-collinear magnetic structure in this ferrimagnetic compound. From the transition-field value the 3d-4f spin-exchange parameter has been derived. Both of these transitions are seen in the magnetoresistance as an abrupt decrease of the resistance.

Twinned olivenite from Cap Garonne, Mine du Pradet – structure and magnetic behavior

2020 ◽  
Vol 235 (1-2) ◽  
pp. 7-13
Author(s):  
Jutta Kösters ◽  
Christian Paulsen ◽  
Frank Stegemann ◽  
Birgit Heying ◽  
Valérie Galéa-Clolus ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Single Crystals ◽  
Cluster Model ◽  
Spin Exchange ◽  
Magnetic Behavior ◽  
Exchange Parameter ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spin Cluster ◽  
Antiferromagnetic Spin

AbstractSystematically twinned olivenite (Cu2(AsO4)OH) single crystals from Cap Garonne, Mine du Pradet, France, were studied by X-ray diffraction: P 21/n, a = 822.69(6) pm, b = 861.88(9) pm, c = 594.06(9) pm, β = 90.000(6)°, wR = 0.0224, 1621 F2 values, 79 variables and a domain ratio of 0.501(1)/0.499(1). The temperature dependence of the magnetic susceptibility was well reproduced with a square-spin cluster model and an antiferromagnetic spin-exchange parameter of J/kB = 157(3) K.

High-Field Magnetization of Single Crystalline TbRh2Si2

2002 ◽  
Vol 71 (6) ◽  
pp. 1565-1569 ◽  
Author(s):  
Hideki Abe ◽  
Hiroyuki Suzuki ◽  
Hideaki Kitazawa
Keyword(s):  
High Field ◽  
Single Crystalline ◽  
Field Magnetization ◽  
High Field Magnetization

scholarly journals High-field antiferromagnetic resonance in single-crystallineLa0.95Sr0.05MnO3:Experimental evidence for the existence of a canted magnetic structure

2000 ◽  
Vol 62 (9) ◽  
pp. 5685-5689 ◽  
Author(s):  
A. Pimenov ◽  
M. Biberacher ◽  
D. Ivannikov ◽  
A. Loidl ◽  
V. Yu. Ivanov ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Magnetic Structure ◽  
High Field ◽  
Antiferromagnetic Resonance

METAMAGNETISM AND SPIN FLUCTUATIONS IN Co-BASED INTERMETALLIC COMPOUNDS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 788-793 ◽  
Author(s):  
TSUNEAKI GOTO ◽  
TOSHIRO SAKAKIBARA
Keyword(s):  
Ground State ◽  
High Field ◽  
Spin Fluctuation ◽  
Spin Fluctuations ◽  
Itinerant Electron ◽  
Metamagnetic Transition ◽  
Paramagnetic Region ◽  
High Field Magnetization ◽  
Transition Field ◽  
Fluctuation Model

High field magnetization and susceptibility of Co-based compounds Y(Co1−xA1x)2 are investigated in the paramagnetic region 0≤x≤0.11. In all the region, a sharp metamagnetic transition is observed, while the susceptibility shows a maximum at finite temperature Tmax. The transition field Hc exhibits a positive shift proportional to T2 with temperature. The Hc in the ground state is found to be proportional to Tmax. The experimental results are discussed with a new theory for itinerant electron metamagnetism based on the spin fluctuation model.

scholarly journals HIGH-FIELD MAGNETIZATION IN THE MOTT-HUBBARD SYSTEM (Y, Ca)VO3

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3058-3061 ◽  
Author(s):  
H. NAKOTTE ◽  
A. M. ALSMADI ◽  
H. KAWANAKA ◽  
K. KINDO ◽  
K. GOTO
Keyword(s):  
Ground State ◽  
Magnetization Curve ◽  
High Field ◽  
Inflection Point ◽  
Calcium Content ◽  
Insulator Transition ◽  
Pulsed Magnetic Fields ◽  
Magnetic Ground State ◽  
High Field Magnetization ◽  
Metal To Insulator Transition

We measured the magnetization of Y 1-x Ca x VO 3 compounds with 0 Ω × Ω, 0.6 in pulsed magnetic fields up to 56 T. YVO 3 exhibits a slightly S-shaped magnetization curve with an inflection point at B c = 42 T . the critical field B c was found to decrease with increasing calcium content, and no sign of an S-shape is seen for the compound with x = 0.6, which is at the boundary of the metal-to-insulator transition. Our data provide further evidence that the metal-to-insulator transition in this system coincides with the transition from a paramagnetic to a magnetic ground state.

High-field, low-temperature magnetoresistance of single crystalline heavy fermion YbNi2B2C

1996 ◽  
Vol 74 (5) ◽  
pp. 641-645 ◽  
Author(s):  
A. Lacerda ◽  
A. Yatskar ◽  
G. M. Schmiedeshoff ◽  
W. P. Beyermann ◽  
P. C. Canfield
Keyword(s):  
Low Temperature ◽  
High Field ◽  
Heavy Fermion ◽  
Single Crystalline

scholarly journals Conduction mechanism in (ZnO/PVC) polymer nanocomposite

2021 ◽  
Vol 2070 (1) ◽  
pp. 012007
Author(s):  
A Joy Singh
Keyword(s):  
Electrical Conductivity ◽  
Electric Field ◽  
Space Charge ◽  
Applied Electric Field ◽  
High Field ◽  
Conduction Mechanism ◽  
Polymer Nanocomposite ◽  
Zno Nanoparticle ◽  
Pure Sample ◽  
Transition Field

Abstract The electrical conductivity of ZnO nanoparticle doped PVC polymer of different concentrations and thickness has been investigated as a function if applied electric field and temperature. The LnJ versus E1/2 plot for the pure sample shows transition field but for highly doped sample, the plot shows curvature for both low and high field, i.e., there is no transition field. This nonlinearity of the plot is due to space charge built up in the sample. The value of β is calculated from the slope of LnJ versus E1/2 plot and compared with the theoretical value. The result shows the Poole-Frenkel mechanism of conduction is operative.

High-field resistivity along the c-axis of single crystalline Bi2Sr2CaCu2O8 + δ

1996 ◽  
Vol 216 (3-4) ◽  
pp. 269-273 ◽  
Author(s):  
Kazuo Kadowaki ◽  
Takashi Mochiku ◽  
Kazuto Hirata ◽  
Hiroyuki Takeya ◽  
Teruaki Nishizaki ◽  
...  
Keyword(s):  
High Field ◽  
Single Crystalline
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