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Ultra-fast annealing manipulated spinodal nano-decomposition in Mn-implanted Ge.
- Source :
- Nanotechnology; 2/1/2019, Vol. 30 Issue 5, p1-1, 1p
- Publication Year :
- 2019
-
Abstract
- In the present work, millisecond-range flash lamp annealing is used to recrystallize Mn-implanted Ge. Through systematic investigations of structural and magnetic properties, we find that the flash lamp annealing produces a phase mixture consisting of spinodally decomposed Mn-rich ferromagnetic clusters within a paramagnetic-like matrix with randomly distributed Mn atoms. Increasing the annealing energy density from 46, via 50, to 56 J cm<superscript>−2</superscript> causes the segregation of Mn atoms into clusters, as proven by transmission electron microscopy analysis and quantitatively confirmed by magnetization measurements. According to x-ray absorption spectroscopy, the dilute Mn ions within Ge are in d<superscript>5</superscript> electronic configuration. This Mn-doped Ge shows paramagnetism, as evidenced by the unsaturated magnetic-field-dependent x-ray magnetic circular dichroism signal. Our study reveals how spinodal decomposition occurs and influences the formation of ferromagnetic Mn-rich Ge–Mn nanoclusters. [ABSTRACT FROM AUTHOR]
- Subjects :
- ANNEALING of metals
MAGNETIC properties
ENERGY density
Subjects
Details
- Language :
- English
- ISSN :
- 09574484
- Volume :
- 30
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 133420310
- Full Text :
- https://doi.org/10.1088/1361-6528/aaefb1