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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Gudim, I. A., Eremin E. V., Begunov A. I., Demidov A. A., Boldyrev K. N.
Заглавие : Magnetization, magnetoelectric polarization, and specific heat of HoGa3(BO3)4
Коллективы : Russian Foundation for Basic Research [13-02-12442-ofi_m2]; Council of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [MK-1700.2013.2]
Место публикации : JETP Letters. - 2014. - Vol. 99, Is. 2. - P.67-75. - ISSN 0021-3640, DOI 10.1134/S0021364014020106. - ISSN 1090-6487
Примечания : Cited References: 28. - This work was supported by the Russian Foundation for Basic Research (project no. 13-02-12442-ofi_m2). K.N.B. also acknowledges the support from the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. MK-1700.2013.2).
Предметные рубрики: HoAl3(BO3)4
Аннотация: A comprehensive experimental and theoretical study of magnetic, magnetoelectric, thermal, and spectroscopic characteristics of HoGa3(BO3)4 gallium borate single crystals has been performed. A large magnetoelectric effect exceeding its values found in all iron and aluminum borates except HoAl3(BO3)4 has been observed. The magnetoelectric polarization of HoGa3(BO3)4 equals ΔP ba (B a ) ≈ −1020 μC/m2 at T = 5 K in a magnetic field of 9 T. The theoretical treatment based on the crystal field model for rare-earth ions provides a unified approach for the consistent interpretation of all measured characteristics. The crystal-field parameters are determined. The temperature (in the 3–300 K range) and magnetic field (up to 9 T) dependences of the magnetization, the Schottky anomaly in the temperature dependence of the specific heat, and its shift in the field B || c are described. To compare the thermal properties of HoGa3(BO3)4 with those of HoAl3(BO3)4 exhibiting record values of the polarization, the specific heat of HoAl3(BO3)4 at various B values and the temperature dependence of the polarization ΔP b (T) in the applied magnetic field of 9 T have been measured.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Volkov D. V., Gudim I. A., Eremin E. V., Boldyrev K. N.
Заглавие : Magnetic, magnetoelastic, and spectroscopic properties of TmAl3(BO3)4
Коллективы : Russian Foundation for Basic Research [13-02-12442ofi_m2]; Russian Federation [MK-1700.2013.2]
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 119, Is. 4. - P.737-744. - ISSN 1063-7761, DOI 10.1134/S106377611410015X. - ISSN 1090-6509
Примечания : Cited References: 28. - This study was supported financially by the Russian Foundation for Basic Research (project no. 13-02-12442ofi_m2) and (K.N.B.) by the grant no. MK-1700.2013.2 from the President of the Russian Federation.
Предметные рубрики: THERMAL-EXPANSION
CRYSTALS
MAGNETOSTRICTION
HoAl3(BO3)4
GARNETS
Аннотация: The thermodynamic properties of alumoborate TmAl3(BO3)4 single crystal are studied experimentally and theoretically. A theoretical analysis based on the crystal field model makes it possible to interpret all measured parameters. The crystal field parameters are determined. The temperature (3–300 K) and field (up to 9 T) dependences of magnetization are described. The field and temperature dependences of multipole moments of the Tm3+ ion in TmAl3(BO3)4 make it possible to describe magnetostriction and low-temperature anomalies in thermal expansion.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Gudim, I. A., Demidov A. A., Eremin E. V.
Заглавие : Magnetoelectric and magnetic properties of aluminum borates Ho1 − x Nd x Al3(BO3)4
Коллективы : Russian Foundation for Basic Research [13-02-12442 ofi_m2]
Место публикации : JETP Letters. - 2015. - Vol. 101, Is. 5. - P.318-324. - ISSN 0021, DOI 10.1134/S002136401505015X. - ISSN 10906487(eISSN)
Примечания : Cited References:26. - This work was supported by the Russian Foundation for Basic Research (project no. 13-02-12442 ofi_m2).
Предметные рубрики: HoAl3(BO3)4
Аннотация: The magnetoelectric and magnetic properties of substituted aluminum borates Ho1 − x Nd x Al3(BO3)4 have been studied experimentally and theoretically. A large magnetoelectric effect exceeding all known values in isostructural compounds except for HoAl3(BO3)4 has been found. The magnetoelectric polarization of Ho0.8Nd0.2Al3(BO3)4 and Ho0.5Nd0.5Al3(BO3)4 at T = 5 K in a field of 9 T is ΔP ab (B b ) ≈ −2630 and 1380 μC/m2, respectively. A theoretical consideration based on the crystal field model for the rare-earth ion made it possible to interpret all measured properties within the unified approach. The crystal field parameters have been determined. The temperature (3–300 K) and field (up to 9 T) dependences of the magnetization and the temperature (5–100 K) and field (up to 9 T) dependences of the polarization have been described. The studied properties of Ho1 − x Nd x Al3(BO3)4 have been compared with those of HoAl3(BO3)4 demonstrating record-high polarization values.
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