Magnetic properties of amorphous Fe2O3-R 2O3 (R = La, Gd and Tb) thin films fabricated by sputtering method

Hirofumi Akamatsu; Shunsuke Murai; Koji Fujita; Katsuhisa Tanaka

Magnetic properties of amorphous Fe₂O₃-R ₂O₃ (R = La, Gd and Tb) thin films fabricated by sputtering method

Hirofumi Akamatsu, Shunsuke Murai, Koji Fujita, Katsuhisa Tanaka

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Amorphous oxide thin films of Fe₂O₃-R ₂O₃ (R = La, Gd and Tb) systems have been deposited on silica glass substrates by using a radio frequency sputtering method, and magnetic properties of the thin films have been examined. The Fe ₂O₃-La₂O₃ thin films exhibit cusp-like maxima of dc magnetic susceptibility in their temperature dependences as well as magnetic aging and memory effects characteristic of typical spin glasses. For Fe₂O₃-Gd₂O₃ and Fe ₂O₃-Tb₂O₃ systems, magnetic moments of iron ions take part in formation of a spin glass state, as indicated by the magnetic aging effects, while those of rare-earth ions remain to be in a paramagnetic state even at very low temperatures.

Original language	English
Title of host publication	Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG
Publisher	Trans Tech Publications
Pages	207-212
Number of pages	6
ISBN (Print)	0878493875, 9780878493876
Publication status	Published - 2008
Externally published	Yes
Event	Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG - Trencin, Slovakia Duration: Jun 22 2008 → Jun 26 2008

Publication series

Name	Advanced Materials Research
Volume	39-40
ISSN (Print)	1022-6680

Other

Other	Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG
Country/Territory	Slovakia
City	Trencin
Period	6/22/08 → 6/26/08

All Science Journal Classification (ASJC) codes

Engineering(all)

Cite this

Magnetic properties of amorphous Fe₂O₃-R ₂O₃ (R = La, Gd and Tb) thin films fabricated by sputtering method. / Akamatsu, Hirofumi; Murai, Shunsuke; Fujita, Koji et al.
Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG. Trans Tech Publications, 2008. p. 207-212 (Advanced Materials Research; Vol. 39-40).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Akamatsu, H, Murai, S, Fujita, K & Tanaka, K 2008, Magnetic properties of amorphous Fe₂O₃-R ₂O₃ (R = La, Gd and Tb) thin films fabricated by sputtering method. in Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG. Advanced Materials Research, vol. 39-40, Trans Tech Publications, pp. 207-212, Glass - The Challenge for the 21st Century - 9th ESG Conference with the Annual Meeting of the ICG, Trencin, Slovakia, 6/22/08.

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title = "Magnetic properties of amorphous Fe2O3-R 2O3 (R = La, Gd and Tb) thin films fabricated by sputtering method",

abstract = "Amorphous oxide thin films of Fe2O3-R 2O3 (R = La, Gd and Tb) systems have been deposited on silica glass substrates by using a radio frequency sputtering method, and magnetic properties of the thin films have been examined. The Fe 2O3-La2O3 thin films exhibit cusp-like maxima of dc magnetic susceptibility in their temperature dependences as well as magnetic aging and memory effects characteristic of typical spin glasses. For Fe2O3-Gd2O3 and Fe 2O3-Tb2O3 systems, magnetic moments of iron ions take part in formation of a spin glass state, as indicated by the magnetic aging effects, while those of rare-earth ions remain to be in a paramagnetic state even at very low temperatures.",

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AB - Amorphous oxide thin films of Fe2O3-R 2O3 (R = La, Gd and Tb) systems have been deposited on silica glass substrates by using a radio frequency sputtering method, and magnetic properties of the thin films have been examined. The Fe 2O3-La2O3 thin films exhibit cusp-like maxima of dc magnetic susceptibility in their temperature dependences as well as magnetic aging and memory effects characteristic of typical spin glasses. For Fe2O3-Gd2O3 and Fe 2O3-Tb2O3 systems, magnetic moments of iron ions take part in formation of a spin glass state, as indicated by the magnetic aging effects, while those of rare-earth ions remain to be in a paramagnetic state even at very low temperatures.

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