Preparation, microstructure, and magnetic properties of bulk nanocrystalline Gd metal

Journal Article · Mon Dec 04 00:00:00 EST 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2400079· OSTI ID:20880131

Yue, M; Zhang, J X; Zeng, H; Wang, K J ^[1]

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1. Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022 (China) and School of Materials Science, Beijing University of Technology, Beijing 100022 (China)

Bulk nanocrystalline gadolinium metal was prepared using spark plasma sintering (SPS) and subsequent annealing process. The SPS Gd metal had a single phase with a mean grain size of about 10 nm. A pressure-induced C-axis crystal texture was found in the SPS Gd sample. With the decrease of Gd grains from micrometer to nanometer range, the Curie temperature T{sub C} decreased by 10.7 K and the magnetic moment per Gd atom at 5 K dropped noticeably from 7.81{mu}{sub B} to 6.31{mu}{sub B}. These results indicate the remarkable influence of the nanostructure on the magnetism of Gd due to the finite size effect.

• OSTI ID: 20880131
• Journal Information: Applied Physics Letters, Vol. 89, Issue 23; Other Information: DOI: 10.1063/1.2400079; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTALS
CURIE POINT
FERROMAGNETIC MATERIALS
GADOLINIUM
GRAIN SIZE
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
NANOSTRUCTURES
PLASMA
SINTERING
TEXTURE