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Das, Pranab Kumar; Thamizhavel, A, E-mail: thamizh@tifr.res.in2015
AbstractAbstract
[en] Single crystal of CeAl has been grown by flux method using Ce-Al self-flux. Several needle like single crystals were obtained and the length of the needle corresponds to the [001] crystallographic direction. Powder x-ray diffraction revealed that CeAl crystallizes in orthorhombic CrB-type structure with space group Cmcm (no. 63). The magnetic properties have been investigated by means of magnetic susceptibility, isothermal magnetization, electrical transport, and heat capacity measurements. CeAl is found to order antiferromagnetically with a Neel temperature T_N = 10 K. The magnetization data below the ordering temperature reveals two metamagentic transitions for fields less than 20 kOe. From the inverse magnetic susceptibility an effective moment of 2.66 μ_B/Ce has been estimated, which indicates that Ce is in its trivalent state. Electrical resistivity data clearly shows a sharp drop at 10 K due to the reduction of spin disorder scattering of conduction electrons thus confirming the magnetic ordering. The estimated residual resistivity ratio (RRR) is 33, thus indicating a good quality of the single crystal. The bulk nature of the magnetic ordering is also confirmed by heat capacity data. From the Schottky anomaly of the heat capacity we have estimated the crystal field level splitting energies of the (2J + 1) degenerate ground state as 25 K and 175 K respectively for the fist and second excited states
Source
SCES2014: International conference on strongly correlated electron systems 2014; Grenoble (France); 7-14 Jul 2014; Available from http://dx.doi.org/10.1088/1742-6596/592/1/012009; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 592(1); [6 p.]

Country of publication
ALUMINIUM ALLOYS, ANTIFERROELECTRIC MATERIALS, CERIUM ALLOYS, CRYSTAL FIELD, CRYSTAL GROWTH, ELECTRIC CONDUCTIVITY, ELECTRONS, EXCITED STATES, GROUND STATES, MAGNETIC SUSCEPTIBILITY, MAGNETIZATION, MONOCRYSTALS, NEEL TEMPERATURE, ORTHORHOMBIC LATTICES, POWDERS, SPECIFIC HEAT, SPIN, TEMPERATURE DEPENDENCE, X-RAY DIFFRACTION
ALLOYS, ANGULAR MOMENTUM, COHERENT SCATTERING, CRYSTAL LATTICES, CRYSTAL STRUCTURE, CRYSTALS, DIELECTRIC MATERIALS, DIFFRACTION, ELECTRICAL PROPERTIES, ELEMENTARY PARTICLES, ENERGY LEVELS, FERMIONS, LEPTONS, MAGNETIC PROPERTIES, MATERIALS, PARTICLE PROPERTIES, PHYSICAL PROPERTIES, RARE EARTH ALLOYS, SCATTERING, THERMODYNAMIC PROPERTIES, THREE-DIMENSIONAL LATTICES, TRANSITION TEMPERATURE
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