| Issue |
Europhys. Lett.
Volume 34, Number 8, June II 1996
|
|
|---|---|---|
| Page(s) | 623 - 628 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00506-9 | |
| Published online | 01 September 2002 | |
Suppression of weak ferromagnetism in small particles of Gd2CuO4
1
Departamento de Física Aplicada, Universidade de
Santiago,
E-15706 Santiago de Compostela, Spain
2
Departamento de Química-Física, Universidade de Santiago,
E-15706 Santiago de Compostela, Spain
3
Centro Atómico Bariloche and Instituto Balseiro,
8400 San Carlos de Bariloche, Argentina
4
Physics Department, San Diego State University -
92182 San Diego, USA
Received:
29
January
1996
Accepted:
25
April
1996
particles were synthesized by sol-gel techniques in order to
study the effects of particle size d on the magnetic properties measured by dc
magnetization and microwave absorption. Decreasing d reduced the intensity and
temperature of onset of weak ferromagnetism, which was not detected at all in
850
particles. This finding is attributed to the impossibility of Cu
three-dimensional antiferromagnetic ordering when d reaches a limit somewhat
below the two-dimensional magnetic correlation length corresponding to bulk
at the Néel temperature.
PACS: 75.50.Tt – Fine-particle systems / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) / 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
© EDP Sciences, 1996
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