Molecule Derived Synthesis of Nanocrystalline YFeO3 and Investigations on Its Weak Ferromagnetic Behavior

A new Y−Fe alkoxide, [YFe(OPri)6(PriOH)]2, is used in the sol−gel process to obtain the orthoferrite, YFeO3. The Y/Fe stoichiometry (1:1) and Y−O(R)−Fe chemical links in the single molecular precursor kinetically control the formation of metastable YFeO3 which is otherwise difficult to prepare due t...

Full description

Saved in:
Bibliographic Details
Published inChemistry of materials Vol. 16; no. 10; pp. 1906 - 1913
Main Authors Mathur, Sanjay, Veith, Michael, Rapalaviciute, Rasa, Shen, Hao, Goya, Gerardo F, Martins Filho, Waldir L, Berquo, Thelma S
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 18.05.2004
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:A new Y−Fe alkoxide, [YFe(OPri)6(PriOH)]2, is used in the sol−gel process to obtain the orthoferrite, YFeO3. The Y/Fe stoichiometry (1:1) and Y−O(R)−Fe chemical links in the single molecular precursor kinetically control the formation of metastable YFeO3 which is otherwise difficult to prepare due to the easy formation of the garnet composition, Y3Fe5O12. TG/DTA analysis showed the crystallization of YFeO3 at 680 °C, which was confirmed by XRD data. The powders obtained were nanocrystalline (TEM) and the only crystalline compound present between 600 and 1300 °C was monophasic YFeO3. The absence of garnet and other iron-containing residual phases observed in previous studies was confirmed by temperature-dependent Mössbauer and magnetization measurements. The magnetization data support a weak ferromagnetic behavior and reveal low- and high-field regimes in M−T and M−H curves, corresponding to magnetocrystalline and antisymmetric-exchange anisotropy, respectively.
Bibliography:ark:/67375/TPS-32BZNKZN-M
istex:7F3189560F08E2B318D738F8A0FDA3B6FB0A29EC
ISSN:0897-4756
1520-5002
DOI:10.1021/cm0311729