In:
Chinese Physics B, IOP Publishing, Vol. 28, No. 5 ( 2019-05-01), p. 057502-
Abstract:
The crystal structure, magnetic and magnetocaloric properties of (Ho 1− x Y x ) 5 Pd 2 ( x = 0, 0.25, and 0.5) compounds are investigated. All the compounds crystallize in a cubic Dy 5 Pd 2 -type structure with the space group Fd 3 m and undergo a second order transition from spin glass (SG) state to paramagnetic (PM) state. The spin glass transition temperatures T g decrease from 26 K for x = 0 to 13 K for x = 0.5. In the PM region, the reciprocal susceptibilities for all the compounds obey the Curie–Weiss law. The paramagnetic Curie temperatures ( θ p ) for Ho 5 Pd 2 , (Ho 0.75 Y 0.25 ) 5 Pd 2 , and (Ho 0.5 Y 0.5 ) 5 Pd 2 are determined to be 32 K, 30 K, and 22 K, respectively, and the corresponding effective magnetic moments ( μ eff ) are 10.8 μ B /Ho, 10.3 μ B /RE, and 7.5 μ B /RE, respectively. Magnetocaloric effect (MCE) is anticipated according to the Maxwell relation, based on the isothermal magnetization curves. For a magnetic field change of 0–5 T, the maximum values of the isothermal magnetic entropy change − Δ S M of the (Ho 1− x Y x ) 5 Pd 2 ( x = 0, 0.25, and 0.5) compounds are determined to be 11.5 J · kg − 1 · K − 1 , 11.1 J · kg − 1 · K − 1 , and 8.9 K J · kg − 1 · K − 1 , with corresponding refrigerant capacity values of 382.3 J · kg − 1 , 336.2 J · kg − 1 , and 242.5 J · kg − 1 , respectively.
Type of Medium:
Online Resource
ISSN:
1674-1056
DOI:
10.1088/1674-1056/28/5/057502
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2019
detail.hit.zdb_id:
2412147-2
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