Pressure effect on magnetic properties of RCo12B6 (R=Y,Ce) compounds |
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| Authors: | Z. Arnold O. Isnard H. Mayot M. Mí?ek J. Kamarád |
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| Affiliation: | 1. Institute of Physics AS CR v.v.i., Na Slovance2, 182 21, Prague 8, Czech Republic;2. Institut Neel, CNRS/Univ. J. Fourier, BP166x 38042 Grenoble cedex, France;1. Materials Science Laboratory, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;2. Department of Physical Chemistry, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;3. Laboratory of Theoretical and Condensed Matter Physics, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;1. Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt;2. Physics Department, Faculty of Science, Oviedo University, Oviedo 33007, Spain;1. Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Bahrain;2. Nanotechnology Centre, University of Bahrain, P.O. Box 32038, Bahrain;1. School of Opto-Electronic and Communication Engineering, Xiamen University of Technology, Xiamen, 361024, China;2. Fujian Key Laboratory of Optoelectronic Technology and Devices, Xiamen, 361024, China;1. Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-972, Brazil;2. Instituto de Física, Universidade de São Paulo, São Paulo, SP 05314-970, Brazil;3. Departamento de Física, Centro Atómico Constituyentes, Comision Nacional de Energía Atomica, Prov. de Buenos Aires, Argentina;4. Escuela de Ciencia y Tecnología, Universidad Nacional de General San Martín, Buenos Aires, Argentina |
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| Abstract: | The effect of pressure on magnetic properties of YCo12B6 and CeCo12B6 was studied in temperature range 5–300 K at pressures up to 9 kbar. The Curie temperature TC and spontaneous magnetization MS decrease with pressure for both compounds. The decrease can be attributed mostly to the volume dependence of both, the Co magnetic moment and the exchange interactions. The hybridization of the p–d states as a consequence of small distances between the Co and B atoms can be one reason of the relatively low pressure effects (ΔTC/Δp=?0.39±0.02 K/kbar, d ln MS/dp=?0.0013±0.0002 kbar?1) in YCo12B6. Higher volume sensitivity of magnetic properties of CeCo12B6 in comparison with YCo12B6 can be attributed to the pressure induced changes of the Ce f- and Co d-states. |
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