Synthesis and magnetic properties of non-equilibrium Eu-rich EuO thin films

Toyohiko J. Konno; Norihiro Ogawa; Kimio Wakoh; Kenji Sumiyama; Kenji Suzuki

doi:10.1143/jjap.35.6052

Synthesis and magnetic properties of non-equilibrium Eu-rich EuO thin films

Toyohiko J. Konno, Norihiro Ogawa, Kimio Wakoh, Kenji Sumiyama, Kenji Suzuki

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

EuO thin films have been formed by reactive evaporation, in which O₂ gas was introduced in the form of a molecular beam directed toward a substrate. In order to optimize preparation conditions, we varied the substrate temperature, T_s. and the ratio of the Eu vapor to O₂ gas deposition rates. R. The structure and magnetic properties of the films were measured by X-ray diffraction and a super-conducting interference device (SQUID) magnetometer. Non-stoichiometric EuO films can be produced more easily at T_s = 200°C than at T_s -300°C. Choosing an appropriate value of R at T_s = 200°C, we obtain Eu-rich EuO films with the Curie temperature of about 150 K. The present method is based on the control of reaction kinetics, and is superior to the post-oxidation method of Eu-metals with respect to the formation of Eu-rich EuO films.

Original language	English
Pages (from-to)	6052-6056
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	35
Issue number	12 A
DOIs	https://doi.org/10.1143/jjap.35.6052
Publication status	Published - 1996 Dec

Keywords

Europium oxide
Magnetic properties
Reactive evaporation
Thin film
X-ray diffraction

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/jjap.35.6052

Cite this

@article{1a8cc6a64b6048428944be70b7884a6c,

title = "Synthesis and magnetic properties of non-equilibrium Eu-rich EuO thin films",

abstract = "EuO thin films have been formed by reactive evaporation, in which O2 gas was introduced in the form of a molecular beam directed toward a substrate. In order to optimize preparation conditions, we varied the substrate temperature, Ts. and the ratio of the Eu vapor to O2 gas deposition rates. R. The structure and magnetic properties of the films were measured by X-ray diffraction and a super-conducting interference device (SQUID) magnetometer. Non-stoichiometric EuO films can be produced more easily at Ts = 200°C than at Ts -300°C. Choosing an appropriate value of R at Ts = 200°C, we obtain Eu-rich EuO films with the Curie temperature of about 150 K. The present method is based on the control of reaction kinetics, and is superior to the post-oxidation method of Eu-metals with respect to the formation of Eu-rich EuO films.",

keywords = "Europium oxide, Magnetic properties, Reactive evaporation, Thin film, X-ray diffraction",

author = "Konno, {Toyohiko J.} and Norihiro Ogawa and Kimio Wakoh and Kenji Sumiyama and Kenji Suzuki",

year = "1996",

month = dec,

doi = "10.1143/jjap.35.6052",

language = "English",

volume = "35",

pages = "6052--6056",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "12 A",

}

TY - JOUR

T1 - Synthesis and magnetic properties of non-equilibrium Eu-rich EuO thin films

AU - Konno, Toyohiko J.

AU - Ogawa, Norihiro

AU - Wakoh, Kimio

AU - Sumiyama, Kenji

AU - Suzuki, Kenji

PY - 1996/12

Y1 - 1996/12

N2 - EuO thin films have been formed by reactive evaporation, in which O2 gas was introduced in the form of a molecular beam directed toward a substrate. In order to optimize preparation conditions, we varied the substrate temperature, Ts. and the ratio of the Eu vapor to O2 gas deposition rates. R. The structure and magnetic properties of the films were measured by X-ray diffraction and a super-conducting interference device (SQUID) magnetometer. Non-stoichiometric EuO films can be produced more easily at Ts = 200°C than at Ts -300°C. Choosing an appropriate value of R at Ts = 200°C, we obtain Eu-rich EuO films with the Curie temperature of about 150 K. The present method is based on the control of reaction kinetics, and is superior to the post-oxidation method of Eu-metals with respect to the formation of Eu-rich EuO films.

AB - EuO thin films have been formed by reactive evaporation, in which O2 gas was introduced in the form of a molecular beam directed toward a substrate. In order to optimize preparation conditions, we varied the substrate temperature, Ts. and the ratio of the Eu vapor to O2 gas deposition rates. R. The structure and magnetic properties of the films were measured by X-ray diffraction and a super-conducting interference device (SQUID) magnetometer. Non-stoichiometric EuO films can be produced more easily at Ts = 200°C than at Ts -300°C. Choosing an appropriate value of R at Ts = 200°C, we obtain Eu-rich EuO films with the Curie temperature of about 150 K. The present method is based on the control of reaction kinetics, and is superior to the post-oxidation method of Eu-metals with respect to the formation of Eu-rich EuO films.

KW - Europium oxide

KW - Magnetic properties

KW - Reactive evaporation

KW - Thin film

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=0030378660&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030378660&partnerID=8YFLogxK

U2 - 10.1143/jjap.35.6052

DO - 10.1143/jjap.35.6052

M3 - Article

AN - SCOPUS:0030378660

VL - 35

SP - 6052

EP - 6056

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 12 A

ER -

Synthesis and magnetic properties of non-equilibrium Eu-rich EuO thin films

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this