Giant and anisotropic magnetocaloric effect in antiferromagnetic single crystalline DySb

✍ Scribed by D.X. Li; S. Nimori; T. Shikama

• Book ID: 104093955
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 819 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.07.049

✦ Synopsis

Magnetocaloric effect has been studied for antiferromagnetic single crystalline DySb, by measuring the temperature (T ) and magnetic field (H) dependences of magnetization in the range 2 ≤ T ≤ 300 K and 0 ≤ H ≤ 7 T with field along the [100] and the [110] direction. The magnetic entropy change caused by a field change of 5 T is as larger as -36.4 J kg -1 K -1 for H//[110] around 11 K, which is a value much greater than that reported for the polycrystalline sample. The magnetocaloric effect is further found to be anisotropic. Above T N (=10 K), the entropy change is much larger for H// [110] than for H//[100]. In contrast, the entropy change is positive below T N , and it is significantly lower for H// [110] than for H//[100]. Our results indicate that DySb is a typical material possessing giant and highly anisotropic magnetocaloric effect, and suggest that magnetic orientation could be used to enhance magnetic entropy change.