Abstract
The magnetic dynamic response of a PrB6 single crystal has been studied using inelastic neutron scattering in a temperature range of 10–120 K, which is above the temperatures of the phase transitions to the magnetic-ordered state. The study is aimed at revealing peculiarities of the state with a low magnetic moment in a temperature range of 7 K < T ≤ 20 K, which was identified in a number of magnetometric experiments. In addition to a quasielastic signal, a weak-dispersion excitation with an energy of ~1 meV has been detected, which exists at temperatures below 24 K. The results have been analyzed from the viewpoint of the formation of a spatially nonuniform state based on domains with short-range magnetic correlations at temperatures of 10–20 K. Judging by the dispersion of excitations, the character of the correlation is similar to that observed in a state with long-range magnetic order which arises at lower temperatures.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
T. Mori, “Higher borides,” Handbook Phys. Chem. Rare Earths 38, 105–173 (2008).
T. Mori, “Magnetic and thermoelectric properties of boron-rich solids,” in Boron Rich Solids: Sensors, Ultra High Temperature Ceramics, Thermoelectrics, Armor, Ed. by N. Orlovskaya and M. Lugovy (Springer Science + Business Media B.V., 2011). DOI: 10.1007/978-90481-9818-4_5
P. A. Alekseev, “High borides: Determining the features and details of lattice dynamics from neutron spectroscopy,” Phys.-Usp. 58, 330–344 (2015).
N. E. Sluchanko, A. N. Azarevich, A. V. Bogach, I. I. Vlasov, V. V. Glushkov, S. V. Demishev, A. A. Maksimov, I. I. Tartakovskii, E. V. Filatov, K. Flakhbart, S. Gabani, V. B. Filippov, N. Yu. Shitsevalova, and V. V. Moshchalkov, “Effects of disorder and isotopic substitution in the specific heat and Raman scattering in LuB12,” J. Exper. Theor. Phys. 113, 468–482 (2011).
M. Lowenhaupt and M. Prager, “Crystal field in PrB6 and NdB6,” Z. Physik B: Condensed Matter 62, 195–199 (1986).
C. M. McCarthy, C. W. Tompson, R. J. Graves, Y. W. White, Z. Fisk, and H. R. Ott, “Low temperature phase transition and magnetic structure of PrB6,” Solid State Commun. 36, 861–868 (1980).
P. Burlet, J. M. Effantin, J. Rossat-Mignod, S. S. Kunii, and T. Kasuya, “Single crystal neutron scattering study of the magnetic ordering in praseodymium hexaboride,” J. Phys. Colloq. 49 Colloque C8, Suppl. 12,, C8-459–C8-460 (1988).
V. N. Lazukov, E. V. Nefeodova, N. N. Tiden, P. A. Alekseev, K. Siemensmeyer, A. Butsheiner, and N. Shitsevalova, “Temperature evolution of Pr-ion magnetic response in PrB6,” J. Alloys Compd. 442, 180–182 (2007).
M. D. Le, K. A. McEwen, J-G. Park, S. Lee, F. Iga, and K. C. Rule, “Magnetic excitation in the ordered phases of praseodymium hexaboride,” J. Phys.: Condens. Matter 20, 104231 (2008).
S. Kobayashi, M. Sera, M. Hiroi, T. Nishizaki, N. Kobayashi, and S. Kunii, “Anisotropic magnetic phase diagram of PrB6,” J. Phys. Soc. Jpn. 70, 1721–1730 (2001).
S. Takagi, S. Itabashi, S. Kunii, and T. Kasuya, “11B nuclear relaxation study of PrB6 and NdB6,” J. Magn. Magn. Mater. 52, 267–270 (1985).
M. Sera, S. Kobayashi, M. Hiroi, N. Kobayashi, and S. Kunii, “Thermal conductivity of RB6 (R = Ce, Pr, Nd, Sm, Eu, Gd),” Phys. Rev. B: Condens. Matter Mater. Phys. 54, R5207–R5210 (1996).
P. A. Alekseev, K. Flachbart, S. Gabani, V. N. Lazukov, P. Priputen, M. Reiffers, J. Sebek, E. Santava, A. V. Dukhnenko, V. B. Filippov, N. B. Shitsevalova, and J.-M. Minie, “Specific features of the formation of the ground state in PrB6,” Phys. Solid State 52, 914–916 (2010).
K. I. Kugel’ and D. I. Khomskii, “The Jahn-Teller effect and magnetism: Transition metal compounds,” Sov. Phys. Usp. 25, 231–256 (1982).
G. A. Gehring, and K. A. Gehãing, “Cooperative Jahn–Teller effects,” Rept. Prog. Phys. 38, 1–90 (1975).
M. A. Anisimov, A. V. Kuznetsov, A. V. Bogach, V. V. Glushkov, S. V. Demishev, N. A. Samarin, N. Yu. Shitsevalova, A. V. Levchenko, V. B. Filippov, and N. E. Sluchanko, “Suppression of spontaneous magnetization in PrB6 paramagnetic phase, Proc. Int. Sci.-Techn. Conf. INTERMATIC 2012, Part 2, pp. 160–163 (2012).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Original Russian Text © V.N. Lazukov, P.A. Alekseev, N.Yu. Shitsevalova, V.B. Philippov, 2016, published in Fizika Metallov i Metallovedenie, 2016, Vol. 117, No. 5, pp. 478–484.
Rights and permissions
About this article
Cite this article
Lazukov, V.N., Alekseev, P.A., Shitsevalova, N.Y. et al. Thermal evolution of magnetic-excitation spectrum of PrB6 . Phys. Metals Metallogr. 117, 460–465 (2016). https://doi.org/10.1134/S0031918X16050136
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031918X16050136