Determination of the magnetocaloric effect from thermophysical parameters and their relationships near magnetic phase transition in doped manganites

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:513

Article

Gamzatov, A. G.¹  Batdalov, A. B.¹  Aliev, A. M.¹  Yen, P. D. H.²  Gudina, S., V³  Neverov, V. N.³  Thanh, T. D.⁴  Dung, N. T.⁴  Yu, S-C⁵  Kim, D-H²  Phan, M. H.⁶ 

[1] RAS, Amirkhanov Inst Phys, DFRC, Makhachkala 367003, Russia

[2] Chungbuk Natl Univ, Dept Phys, Cheongju 28644, South Korea

[3] RAS, Miheev Inst Met Phys, Ural Branch, Ekaterinburg 620108, Russia

[4] VAST, Inst Mat Sci, 18 Hoang, Hanoi, Vietnam

[5] Ulsan Natl Inst Sci & Technol, 50 UNIST Gil, Ulsan 44919, South Korea

[6] Univ S Florida, Dept Phys, 4202 East Fowler Ave, Tampa, FL 33620 USA

关键词: Manganites;    Magnetic entropy change;    Magnetoresistance;    Magnetostriction;    Thermal diffusivity;    Thermal conductivity;   

DOI  :  10.1016/j.jmmm.2020.167209

来源: Elsevier

【 摘 要 】

We present the results of a comparative analysis of the magnetocaloric effect (MCE) in Pr(0.7)Sr(0.2)Ca(0.1)NnO(3), through direct and indirect measurements, using experimentally measured magnetization, specific heat, magnetostriction, resistivity, thermal diffusivity and thermal conductivity parameters. We have demonstrated that the change in each parameter in response to a magnetic field near the ferromagnetic-paramagnetic phase transition temperature of the material correlates with the change in magnetic entropy. These findings allow us to interrelate these parameters and provide an alternative, effective approach for accessing the usefulness of magnetocaloric materials.

【 授权许可】

Free