The large cryogenic magnetocaloric effect of TbAl sub(2) nanocapsules

TbAl sub(2) nanocapsules with a core of TbAl sub(2) compound and a shell of amorphous Al sub(2)O sub(3) were synthesized by the arc-discharge technique using modified strategies. The TbAl sub(2) nanocapsules display superparamagnetic properties between the blocking temperature of 70K and the Curie t...

Full description

Saved in:
Bibliographic Details
Published inScripta materialia Vol. 59; no. 3; pp. 340 - 343
Main Authors Liu, X G, Geng, D Y, Du, J, Ma, S, Li, B, Shang, P J, Zhang, Z D
Format Journal Article
LanguageEnglish
Published 01.08.2008
Subjects
Aluminum oxide
Curie temperature
Entropy
Nanocomposites
Nanomaterials
Nanostructure
Shells
Strategy
Online AccessGet full text

Cover

More Information
Summary:TbAl sub(2) nanocapsules with a core of TbAl sub(2) compound and a shell of amorphous Al sub(2)O sub(3) were synthesized by the arc-discharge technique using modified strategies. The TbAl sub(2) nanocapsules display superparamagnetic properties between the blocking temperature of 70K and the Curie temperature of 100K. The absolute value of the change of magnetic entropy of the TbAl sub(2) nanocapsules rapidly increases with decreasing temperature, reaching 23.83Jkg super(-) super(1)K super(-) super(1) at 7.5K with a magnetic field change of 70kOe.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-1
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2008.04.005