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Title: Crystal growth and magnetic properties of equiatomic CeAl
Authors: Das, P.K 
Thamizhavel, A
Keywords: Electrons
Excited states
Ground state
Magnetic properties
Magnetic susceptibility
Specific heat
X ray diffraction
Crystallographic directions
Electrical resistivity datum
Heat capacity measurements
Inverse magnetic susceptibility
Isothermal magnetization
Powder X ray diffraction
Residual resistivity ratios
Spin-disorder scattering
Single crystals
Issue Date: 2014
Publisher: IOP Publishing
Citation: Das, P.K, Thamizhavel, A (2014). Crystal growth and magnetic properties of equiatomic CeAl. Journal of Physics: Conference Series 592 (1) : 12009. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: 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 TN =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 ?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 Title: Journal of Physics: Conference Series
ISSN: 1742-6588
DOI: 10.1088/1742-6596/592/1/012009
Rights: Attribution 4.0 International
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