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Title: Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles

Journal Article · · AIP Advances
DOI:https://doi.org/10.1063/1.5007686· OSTI ID:1434311
ORCiD logo [1];  [1];  [2];  [3];  [3];  [1]
  1. Virginia Commonwealth Univ., Richmond, VA (United States)
  2. Univ. of Texas at El Paso, El Paso, TX (United States)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
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Gadolinium silicide (Gd5Si4) nanoparticles (NPs) exhibit different properties compared to their parent bulk materials due to finite size, shape, and surface effects. NPs were prepared by high energy ball-milling of the as-cast Gd5Si4 ingot and size separated into eight fractions using time sensitive sedimentation in an applied dc magnetic field with average particle sizes ranging from 700 nm to 82 nm. The largest Gd5Si4 NPs order ferromagnetically at 316 K. A second anomaly observed at 110 K can be ascribed to a Gd5Si3 impurity. Here as the particle sizes decrease, the volume fraction of Gd5Si3 phase increases at the expense of the Gd5Si4 phase, and the ferromagnetic transition temperature of Gd5Si4 is reduced from 316 K to 310 K, while the ordering of the minor phase is independent of the particle size, remaining at 110 K.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
1610967; AC02-07CH11358
OSTI ID:
1434311
Alternate ID(s):
OSTI ID: 1416638
Report Number(s):
IS-J-9624
Journal Information:
AIP Advances, Vol. 8, Issue 5; ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (12)

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Enhancement of 𝜷-phase in PVDF films embedded with ferromagnetic Gd 5 Si 4 nanoparticles for piezoelectric energy harvesting journal May 2017
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Gd-Si Oxide Nanoparticles as Contrast Agents in Magnetic Resonance Imaging journal June 2016
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Ferromagnetic Gd5Si4 Nanoparticles as T2 Contrast Agents for Magnetic Resonance Imaging journal January 2017
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Magnetic nanoparticles: A multifunctional vehicle for modern theranostics journal June 2017
Characteristics of gadolinium-DTPA complex: a potential NMR contrast agent journal March 1984
Mn5Si3-Type Host-Interstitial Boron Rare-Earth Metal Silicide Compounds RE5Si3: Crystal Structures, Physical Properties and Theoretical Considerations. journal November 2006

Cited By (3)

Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4 journal July 2019
Differential effect of magnetic alignment on additive manufacturing of magnetocaloric particles journal January 2020
Gadolinium silicide (Gd 5 Si 4 ) nanoparticles for tuneable broad band microwave absorption journal February 2019

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