Cd Doping Effects In The Heavy-fermion Compounds Ce2 Min 8 ( M=rh And Ir)

Low-temperature magnetic properties of Cd-doped Ce2 M In 8 (M=Rh and Ir) single crystals are investigated. Experiments of temperature-dependent magnetic-susceptibility, heat-capacity, and electrical-resistivity measurements revealed that Cd doping enhances the antiferromagnetic (AFM) ordering temperature from TN =2.8 K (x=0) to TN =4.8 K (x=0.21) for Ce2 RhIn8-x Cd x and induces long-range AFM ordering with TN =3.8 K (x=0.21) for Ce2 IrIn8-x Cdx. Additionally, x-ray and neutron magnetic scattering studies showed that Cd-doped samples present below TN a commensurate antiferromagnetic structure with a propagation vector ε→ = (1/2, 1/2, 0). The resolved magnetic structures for both compounds indicate that the Cd doping tends to rotate the direction of the ordered magnetic moments toward the ab plane. This result suggests that the Cd doping affects the Ce3+ ground-state single-ion anisotropy modifying the crystalline electrical field (CEF) parameters at the Ce3+ site. Indications of CEF evolution induced by Cd doping were also found in the electrical-resistivity measurements. Comparisons between our results and the general effects of Cd doping on the related compounds CeMIn 5 (M=Co, Rh, and Ir) confirms the claims that the Cd doping induced electronic tuning is the main effect favoring AFM ordering in these compounds. © 2010 The American Physical Society.8124Monthoux, P., Lonzarich, G.G., (1999) Phys. Rev. B, 59, p. 14598. , 10.1103/PhysRevB.59.14598;Hilbert Löhneysen, V., Rosch, A., Vojta, M., Wölfle, P., (2007) Rev. Mod. Phys., 79, p. 1015. , 10.1103/RevModPhys.79.1015;Kronmuller, H., Parkin, S., (2007) Handbook of Magnetism and Advanced Magnetic Materials, 1. , Wiley, New YorkPark, T., Ronning, F., Yuan, H.Q., Salamon, M.B., Movshovich, R., Sarrao, J.L., Thompson, J.D., (2006) Nature (London), 440, p. 65. , 10.1038/nature04571Petrovic, C., Pagliuso, P.G., Hundley, M.F., Movshovich, R., Sarrao, J.L., Thompson, J.D., Fisk, Z., Monthoux, P., (2001) J. Phys.: Condens. Matter, 13, p. 337. , 10.1088/0953-8984/13/17/103Pagliuso, P.G., Moreno, N.O., Curro, N.J., Thompson, J.D., Hundley, M.F., Sarrao, J.L., Fisk, Z., Cornelius, A.L., (2002) Phys. Rev. B, 66, p. 054433. , 10.1103/PhysRevB.66.054433Pagliuso, P.G., Movshovich, R., Bianchi, A.D., Nicklas, M., Moreno, N.O., Thompson, J.D., Hundley, M.F., Fisk, Z., (2002) Physica B, 312-313, p. 129. , 10.1016/S0921-4526(01)01281-9Zheng, G.-Q., Yamaguchi, N., Kan, H., Kitaoka, Y., Sarrao, J.L., Pagliuso, P.G., Moreno, N.O., Thompson, J.D., (2004) Phys. Rev. B, 70, p. 014511. , 10.1103/PhysRevB.70.014511Park, T., Sidorov, V.A., Ronning, F., Zhu, J.-X., Tokiwa, Y., Lee, H., Bauer, E.D., Thompson, J.D., (2008) Nature (London), 456, p. 366. , 10.1038/nature07431Nicklas, M., Sidorov, V.A., Borges, H.A., Pagliuso, P.G., Petrovic, C., Fisk, Z., Sarrao, J.L., Thompson, J.D., (2003) Phys. Rev. B, 67, p. 020506. , 10.1103/PhysRevB.67.020506Mendonça-Ferreira, L., Park, T., Sidorov, V., Nicklas, M., Bittar, E.M., Lora-Serrano, R., Hering, E.N., Pagliuso, P.G., (2008) Phys. Rev. Lett., 101, p. 017005. , 10.1103/PhysRevLett.101.017005Bauer, E.D., Ronning, F., Capan, C., Graf, M.J., Vandervelde, D., Yuan, H.Q., Salamon, M.B., Kauzlarich, S.M., (2006) Phys. Rev. B, 73, p. 245109. , 10.1103/PhysRevB.73.245109Ramos, S.M., Fontes, M.B., Alvarenga, A.D., Baggio-Saitovitch, E., Pagliuso, P.G., Bauer, E.D., Thompson, J.D., Continentino, M.A., (2005) Physica B, 359-361, p. 398. , 10.1016/j.physb.2005.01.076Daniel, M., Bauer, E.D., Han, S.-W., Booth, C.H., Cornelius, A.L., Pagliuso, P.G., Sarrao, J.L., (2005) Phys. Rev. Lett., 95, p. 016406. , 10.1103/PhysRevLett.95.016406Pham, L.D., Park, T., Maquilon, S., Thompson, J.D., Fisk, Z., (2006) Phys. Rev. Lett., 97, p. 056404. , 10.1103/PhysRevLett.97.056404Nicklas, M., Stockert, O., Park, T., Habicht, K., Kiefer, K., Pham, L.D., Thompson, J.D., Steglich, F., (2007) Phys. Rev. B, 76, p. 052401. , 10.1103/PhysRevB.76.052401Urbano, R.R., Young, B.-L., Curro, N.J., Thompson, J.D., Pham, L.D., Fisk, Z., (2007) Phys. Rev. Lett., 99, p. 146402. , 10.1103/PhysRevLett.99.146402Donath, J.G., Steglish, F., Bauer, E.D., Ronning, F., Sarrao, J.L., Gegenwar, P., (2009) EPL, 87, p. 57011. , 10.1209/0295-5075/87/57011Hering, E.N., Borges, H.A., Ramos, S.M., Fontes, M.B., Baggio-Saitovich, E., Bittar, E.M., Mendonça Ferreira, L., Thompson, J.D., (2008) Physica B, 403, p. 780. , 10.1016/j.physb.2007.10.030Moreno, N.O., Hundley, M.F., Pagliuso, P.G., Movshovich, R., Nicklas, M., Thompson, J.D., Sarrao, J.L., Fisk, Z., (2002) Physica B, 312-313, p. 274. , 10.1016/S0921-4526(01)01110-3Kaczorowski, D., Pikul, A.P., Gnida, D., Tran, V.H., (2009) Phys. Rev. Lett., 103, p. 027003. , 10.1103/PhysRevLett.103.027003;Uhlírová, K., Prokleška, J., Sechovský, V., (2010) Phys. Rev. Lett., 104, p. 059701. , 10.1103/PhysRevLett.104.059701Bao, W., Pagliuso, P.G., Sarrao, J.L., Thompson, J.D., Fisk, Z., Lynn, J.W., (2001) Phys. Rev. B, 64, p. 020401. , 10.1103/PhysRevB.64.020401Morris, G.D., Heffner, R.H., Moreno, N.O., Pagliuso, P.G., Sarrao, J.L., Dunsiger, S.R., Nieuwenhuys, G.J., Bernal, O.O., (2004) Phys. Rev. B, 69, p. 214415. , 10.1103/PhysRevB.69.214415Pagliuso, P.G., Thompson, J.D., Hundley, M.F., Sarrao, J.L., Fisk, Z., (2001) Phys. Rev. B, 63, p. 054426. , 10.1103/PhysRevB.63.054426Fisk, Z., Remeika, J.P., (1989) Handbook on the Physics and Chemistry of Rare Earths, 12, p. 53. , Elsevier, North-Holland, AmsterdamPagliuso, P.G., Thompson, J.D., Hundley, M.F., Sarrao, J.L., (2000) Phys. Rev. B, 62, p. 12266. , 10.1103/PhysRevB.62.12266Pagliuso, P.G., Garcia, D.J., Miranda, E., Granado, E., Lora Serrano, R., Giles, C., Duque, J.G.S., Sarrao, J.L., (2006) J. Appl. Phys., 99, pp. 08P703. , 10.1063/1.2176109Lora-Serrano, R., Giles, C., Granado, E., Garcia, D.J., Miranda, E., Agüero, O., Mendonça-Ferreira, L., Pagliuso, P.G., (2006) Phys. Rev. B, 74, p. 214404. , 10.1103/PhysRevB.74.214404Hieu, N.V., Shishido, H., Nakashima, H., Sugiyama, K., Settai, R., Takeuchi, T., Matsuda, T.D., Onuki, Y., (2007) J. Magn. Magn. Mater., 310, p. 1721. , 10.1016/j.jmmm.2006.10.546Hudis, J., Hu, R., Broholm, C.L., Mitrović, V.F., Petrovic, C., (2006) J. Magn. Magn. Mater., 307, p. 301. , 10.1016/j.jmmm.2006.04.023Doniach, S., (1977) Valence Instabilities and Related Narrow Band Phenomena, p. 169. , in edited by R. D. Parks (Plenum, New YorkMoshopoulou, E.G., Fisk, Z., Sarrao, J.L., Thompson, J.D., (2001) J. Solid State Chem., 158, p. 25. , 10.1006/jssc.2000.9052Moshopoulou, E.G., Ibberson, R.M., Sarrao, J.L., Thompson, J.D., Fisk, Z., (2006) Acta Crystallogr., Sect. B: Struct. Sci., 62, p. 173. , 10.1107/S0108768106003314Adriano, C., Giles, C., Mendonça-Ferreira, L., De Bergevin, F., Mazzoli, C., Paolasini, L., Fisk, Z., Pagliuso, P.G., (2009) Physica B, 404, p. 3014. , 10.1016/j.physb.2009.07.030Hill, J.P., McMorrow, D.F., (1996) Acta Crystallogr., Sect. A: Found. Crystallogr., 52, p. 236. , 10.1107/S0108767395012670Blume, M., Gibbs, D., (1988) Phys. Rev. B, 37, p. 1779. , 10.1103/PhysRevB.37.1779Adriano, C., Lora-Serrano, R., Giles, C., De Bergevin, F., Lang, J.C., Srajer, G., Mazzoli, C., Pagliuso, P.G., (2007) Phys. Rev. B, 76, p. 104515. , 10.1103/PhysRevB.76.104515Granado, E., Pagliuso, P.G., Giles, C., Lora-Serrano, R., Yokaichiya, F., Sarrao, J.L., (2004) Phys. Rev. B, 69, p. 144411. , 10.1103/PhysRevB.69.144411Mannix, D., De Camargo, P.C., Giles, C., De Oliveira, A.J.A., Yokaichiya, F., Vettier, C., (2001) Eur. Phys. J. B, 20, p. 19. , 10.1007/s100510170281Adriano, C., Giles, C., Coelho, L.N., Faria, G.A., Pagliuso, P.G., (2009) Physica B, 404, p. 3289. , 10.1016/j.physb.2009.07.127Squires, G.L., (1996) Introduction to the Theory of Thermal Neutron Scattering, , Dover, Mineola, New YorkShirane, G., Shapiro, S.M., Tranquada, J.M., (2002) Neutron Scattering with A Triple-Axis Spectrometer: Basic Techniques, , Cambrige University Press, Cambridge, 10.1017/CBO9780511534881Blume, M., Freeman, A.J., Watson, R.E., (1962) J. Chem. Phys., 37, p. 1245. , 10.1063/1.173327

Study on media plurality and diversity online : final report

Published online: 16 September 2022The Study on Media Plurality and Diversity Online investigates the value of safeguarding media pluralism and diversity online, focusing on (i) the prominence and discoverability of general interest content and services, and on (ii) market plurality and the concentration of economic resources. With a focus on Europe, the project is funded by a tender from the European Commission to produce a study on Media Plurality and Diversity Online and involves four partner universities: CMPF (EUI); CiTiP (Centre for Information Technology and Intellectual Property) of KU Leuven; the Institute for Information Law of the University of Amsterdam (IViR/UvA); imec-SMIT-Vrije Universiteit Brussel. The purpose of the assignment was to describe, analyse and evaluate the existing regulatory and business practices in the two areas mentioned above, and finally to elaborate some policy recommendations. Data were collected from the database of the Media Pluralism Monitor (CMPF) and through desk research, online consultations and interviews with stakeholders. The contractor was able to call on a network of national experts across the Member States to support this work

REXS contribution to electronic ordering investigation in solids

Resonant Elastic X-Ray Scattering (REXS) has played a fundamental role in understanding electronic properties and in revealing hidden order, local symmetries and exotic states realized in correlated solids. This article reports on some of the relevant scientific contributions and technical advances over the last 20 years, by providing a list of related publications produced by various groups all around the world. The given perspective is that of a group of young scientists involved at various times in the investigation of the beauty of electronic ordering by the REXS technique. © 2012 EDP Sciences, Springer-Verlag