Low temperature optical study of Gadolinium molybdate and influence of an external magnetic field

1978 ◽  
Vol 24 (3) ◽  
pp. 341-344
Author(s):  
N.G. Theophanous ◽  
T. Sauder ◽  
M. Certier ◽  
C. Carabatos
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Optical Study ◽  
Gadolinium Molybdate

EFFECT OF DISORDER ON THE ELECTRICAL PROPERTIES OF AMORPHOUS CONDUCTING CARBON FILMS: OBSERVANCE OF FIELD INDUCED METAL-INSULATOR TRANSITION?

2000 ◽  
Vol 14 (02n03) ◽  
pp. 224-229 ◽  
Author(s):  
V. MEENAKSHI ◽  
S. V. SUBRAMANYAM
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Carbon Films ◽  
Electronic Systems ◽  
Metal Insulator Transition ◽  
Preparation Temperature ◽  
Metal Insulator ◽  
Effect Of Disorder

In this work, the influence of disorder on the electrical properties (DC conductivity and Magnetoresistance) of amorphous conducting carbon films, prepared by the pyrolysis of Tetra chloro phthalic anhydride, is reported and discussed. The low temperature electrical properties are analyzed in terms of the various models developed for disordered electronic systems. The results indicate the possibility of a metal - insulator (M-I) transition, both as a function of preparation temperature and an external magnetic field.

The Influnence of the Amplitude and Frequency of Sweeped Magnetic Field on the Exchange Bias and Coercivity for Ferromagnetic / Antiferromagnetic Films: Monte Carlo Simulation

2011 ◽  
Vol 694 ◽  
pp. 538-542
Author(s):  
Wen Ting Zheng ◽  
Li Qin Jiang ◽  
Zhi Gao Huang
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Relaxation Time ◽  
Monte Carlo Method ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Exchange Bias

The influnence of the amplitude (H0) and frequency of sweeped magnetic field on the exchange bias He and coercivity Hc for ferromagnetic/ antiferromagnetic films has been simulated with Monte Carlo method. In a cycle, the sweeped frequency is inversely proportional to Monte Carlo steps (MCSs). It is observed that, for smaller MCSs, the values of He and the blocking tempreture Tb reduce evidently with increasing MCSs; for larger MCSs, the values of He and Tb decrease gently with increasing MCSs. It is also found the values of He and Tb decrease obviously with increasing values of H0 (HN0). However, on the contrary, the value of Hc increases with increasing values of H0 (HN0). At low temperature and little HN0, the asymmetric loop may appear, which is attributed to the competition between the relaxation time and the period of the external magnetic field. Moreover, the symmetry of the loops influences evidently the values of He and Hc.

Spin Isotope Separation Under Incomplete Carbon Oxidation in a Low-Temperature Plasma in an External Magnetic Field

2015 ◽  
Vol 57 (10) ◽  
pp. 1442-1448 ◽  
Author(s):  
V. F. Myshkin ◽  
V. A. Khan ◽  
V. G. Plekhanov ◽  
D. A. Izhoykin ◽  
E. V. Bespala
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Isotope Separation ◽  
Carbon Oxidation ◽  
Low Temperature Plasma ◽  
Temperature Plasma

Magnetic Prehistory in the Heat Capacity of the Low-Temperature Superconductors

2015 ◽  
Vol 233-234 ◽  
pp. 741-744
Author(s):  
Sergey Mikhailovich Podgornykh
Keyword(s):  
Magnetic Field ◽  
Heat Capacity ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Temperature Dependence ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Ring Specimen ◽  
Trapped Flux ◽  
The Magnetic Field

Effect of the magnetic prehistory on the temperature dependence of the heat capacity of the superconducting Pb, La, Sn. has been studied. As soon as the external magnetic field riches the valueHext=HCthe superconductivity is completely destroyed. The trapped flux was produced in the ring specimen after the magnetic field was turned off atT<TC. We observed a difference of the value of the heat capacity between zero field cooled (ZFC) and field cooled (FC) states in zero magnetic field for the ring specimen. It is found that the FC heat capacity is smaller than the heat capacity both in the normal and in superconducting states.

scholarly journals Low-Temperature Behavior of the Specific Heat for an N-Spin Ferromagnetic Material in an External Magnetic Field

2018 ◽  
Vol 9 (3) ◽  
pp. 36
Author(s):  
Seung-Yeon Kim
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Specific Heat ◽  
Ferromagnetic Material ◽  
Low Energy ◽  
Temperature Behavior ◽  
Energy Structure ◽  
Schottky Anomaly ◽  
First Time

<p>A ferromagnetic material in the absence of an external magnetic field shows the peak of its specific heat in low temperature, called the Schottky anomaly, which is vital in understanding the low-energy structure of a given material. A general formula for the low-temperature behavior of the specific heat of an N-spin ferromagnetic material in an external magnetic field (the generalized Schottky anomaly) is obtained for the first time. Also, as a representative example of ferromagnetic materials in an external magnetic field, the low-temperature behavior of the specific heat for the Ising ferromagnet is studied.</p>

Magnetism and Structural Behavior of CeRuSn Single Crystal

2012 ◽  
Vol 194 ◽  
pp. 40-44 ◽  
Author(s):  
Jan Fikáček ◽  
Jiří Prchal ◽  
Jan Prokleška ◽  
Ivana Císařová ◽  
Vladimír Sechovský
Keyword(s):  
Magnetic Field ◽  
Electrical Resistivity ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Specific Heat ◽  
Single Crystals ◽  
Structural Behavior ◽  
Large Temperature ◽  
Temperature Hysteresis ◽  
Antiferromagnetic Transition

We have synthesized CeRuSn single crystals and performed measurements of electrical resistivity and specific heat. At high temperatures, abrupt transitions were observed at 290 and 225 K in electrical resistivity during cooling. Both transitions are connected with a large temperature hysteresis. Low temperature properties are dominated by an antiferromagnetic transition at 2.9 K, which involves only half of cerium ions, leaving the rest of them non-magnetic. A significant magnetocrystalline anizotropy was revealed by application of external magnetic field.

Slow magnetic relaxation in Cu(ii)–Eu(iii) and Cu(ii)–La(iii) complexes

2019 ◽  
Vol 43 (32) ◽  
pp. 12698-12701 ◽  
Author(s):  
Malay Dolai ◽  
Mahammad Ali ◽  
Cyril Rajnák ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Ground State ◽  
Magnetic Relaxation ◽  
Slow Magnetic Relaxation ◽  
Paramagnetic Behaviour

A dinuclear [(H2O)Cu(HLN2O2)Eu(NO3)3] complex exhibits paramagnetic behaviour with S = 1/2 ground state. At low temperature it displays slow magnetic relaxation that is supported by a small external magnetic field.

Low Temperature FMR in the System of Non-Interacting Magnetic Nanodisks

2012 ◽  
Vol 190 ◽  
pp. 593-596
Author(s):  
Sergey V. Nedukh ◽  
Sergey I. Tarapov ◽  
Dmytriy P. Belozorov ◽  
Anna A. Kharchenko ◽  
Olga Yu. Salyuk ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Comparative Analysis ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Fundamental Mode ◽  
Low Temperatures ◽  
Microwave Range ◽  
Disk Diameter ◽  
X Band ◽  
Center Distance

Magnetodynamical properties of systems of magnetic nanodisks at the microwave range and low temperatures were studied experimentally. Several periodic square arrays of Permalloy nanodisks deposited onto a glass substrate have been studied. The interdisk center-to-center distance in each array was equal to double disk diameter . The magnetoresonance studies were performed at 70-80 GHz frequency band and at the temperature of 4.2 K. The static external magnetic field was applied perpendicularly to the disks array. As a result the magnetoresonance absorption spectra have been obtained, containing both fundamental mode and spin wave modes. A comparative analysis of the results is performed with the X-band results obtained at T = 300K.

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