Superantiferromagnetic EuTe nanoparticles: room temperature colloidal synthesis, structural characterization, and magnetic properties.
In this communication, EuTe nanoparticles with different size distributions have been synthesized for the first time at room temperature by injection of ethylene glycol solution of Na2Te into ethylene glycol solution of EuCl2 in the presence of triethanolamine. By adding phenanthroline into EuCl2 solution, EuTe nanospindles have also been synthesized. The as-synthesized EuTe nanocrystals show size-dependent optical properties. Low-temperature magnetic measurements show that 6.5 nm EuTe nanoparticles show pronounced superantiferromagnetic transition between 2 K and 20 K. Our facile synthesis route opens up the opportunity of studying and applying this classical Heisenberg antiferromagnetic material in quantized-size range; our magnetic analysis indicates that the properties of EuTe can be tuned by the change of its diameter.
Interdisciplinary Graduate Program in Materials Science, Vanderbilt University, Nashville, TN, USA.
Weidong
W
He
Suseela
S
Somarajan
Dmitry S
DS
Koktysh
James H
JH
Dickerson
D019855:Ethylene Glycol / Q000737:chemistry; D005063:Europium / Q000737:chemistry; D008280:Magnetics; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature
C032039:sodium tellurate(IV); D005063:Europium; D019855:Ethylene Glycol; D013691:Tellurium