57Fe Mössbauer spectroscopy investigation of the Fe II/III mixed-valence state and the B-site order in double perovskite A2FeMoO6

Johan Lindén; Hisao Yamauchi; Maarit Karppinen

doi:10.1016/j.jmmm.2003.11.351

⁵⁷Fe Mössbauer spectroscopy investigation of the Fe ^II/III mixed-valence state and the B-site order in double perovskite A₂FeMoO₆

Johan Lindén^*, Hisao Yamauchi, Maarit Karppinen

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Konferenssiartikkeli › Tieteellinen › vertaisarvioitu

4 Sitaatiot (Scopus)

Abstrakti

B-site ordered double-perovskite samples A₂FeMoO₆, with A=Ca, Sr or Ba were synthesized in a reducing atmosphere using an encapsulation technique. The samples were characterized by ⁵⁷Fe Mössbauer spectroscopy. The valence of Fe was found to be in an intermediate II/III state, being close to the midpoint for A=Sr and slightly shifted towards II for Ba. The degree of B-site ordering was found to be more than 95%. Using various synthesis temperatures the ordering could be tuned. Fe atoms replacing Mo at the antisite and adjacent to it were identified in the Mössbauer data. Presence of antiphase boundaries was also seen.

Alkuperäiskieli	Englanti
Sivut	843-844
Sivumäärä	2
Julkaisu	Journal of Magnetism and Magnetic Materials
Vuosikerta	272-276
DOI - pysyväislinkit	https://doi.org/10.1016/j.jmmm.2003.11.351
Tila	Julkaistu - toukok. 2004
OKM-julkaisutyyppi	A4 Artikkeli konferenssijulkaisuussa
Tapahtuma	Proceedings of the International Conference on Magnetism - Rome, Italy Kesto: 27 heinäk. 2003 → 1 elok. 2003

Pääsy asiakirjaan

10.1016/j.jmmm.2003.11.351

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Link to publication in Scopus

Viittausmuodot

@article{bbe3692645cf4022991fd0ae9576d151,

title = "57Fe M{\"o}ssbauer spectroscopy investigation of the Fe II/III mixed-valence state and the B-site order in double perovskite A2FeMoO6",

abstract = "B-site ordered double-perovskite samples A2FeMoO6, with A=Ca, Sr or Ba were synthesized in a reducing atmosphere using an encapsulation technique. The samples were characterized by 57Fe M{\"o}ssbauer spectroscopy. The valence of Fe was found to be in an intermediate II/III state, being close to the midpoint for A=Sr and slightly shifted towards II for Ba. The degree of B-site ordering was found to be more than 95%. Using various synthesis temperatures the ordering could be tuned. Fe atoms replacing Mo at the antisite and adjacent to it were identified in the M{\"o}ssbauer data. Presence of antiphase boundaries was also seen.",

keywords = "Double perovskite, Halfmetal, M{\"o}ssbauer, Valence mixing",

author = "Johan Lind{\'e}n and Hisao Yamauchi and Maarit Karppinen",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.11.351",

language = "English",

volume = "272-276",

pages = "843--844",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

note = "Proceedings of the International Conference on Magnetism ; Conference date: 27-07-2003 Through 01-08-2003",

}

⁵⁷Fe Mössbauer spectroscopy investigation of the Fe ^II/III mixed-valence state and the B-site order in double perovskite A₂FeMoO₆. / Lindén, Johan; Yamauchi, Hisao; Karppinen, Maarit.
julkaisussa: Journal of Magnetism and Magnetic Materials, Vuosikerta 272-276, 05.2004, s. 843-844.

Tutkimustuotos: Lehtiartikkeli › Konferenssiartikkeli › Tieteellinen › vertaisarvioitu

TY - JOUR

T1 - 57Fe Mössbauer spectroscopy investigation of the Fe II/III mixed-valence state and the B-site order in double perovskite A2FeMoO6

AU - Lindén, Johan

AU - Yamauchi, Hisao

AU - Karppinen, Maarit

PY - 2004/5

Y1 - 2004/5

N2 - B-site ordered double-perovskite samples A2FeMoO6, with A=Ca, Sr or Ba were synthesized in a reducing atmosphere using an encapsulation technique. The samples were characterized by 57Fe Mössbauer spectroscopy. The valence of Fe was found to be in an intermediate II/III state, being close to the midpoint for A=Sr and slightly shifted towards II for Ba. The degree of B-site ordering was found to be more than 95%. Using various synthesis temperatures the ordering could be tuned. Fe atoms replacing Mo at the antisite and adjacent to it were identified in the Mössbauer data. Presence of antiphase boundaries was also seen.

AB - B-site ordered double-perovskite samples A2FeMoO6, with A=Ca, Sr or Ba were synthesized in a reducing atmosphere using an encapsulation technique. The samples were characterized by 57Fe Mössbauer spectroscopy. The valence of Fe was found to be in an intermediate II/III state, being close to the midpoint for A=Sr and slightly shifted towards II for Ba. The degree of B-site ordering was found to be more than 95%. Using various synthesis temperatures the ordering could be tuned. Fe atoms replacing Mo at the antisite and adjacent to it were identified in the Mössbauer data. Presence of antiphase boundaries was also seen.

KW - Double perovskite

KW - Halfmetal

KW - Mössbauer

KW - Valence mixing

UR - http://www.scopus.com/inward/record.url?scp=2642540290&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2003.11.351

DO - 10.1016/j.jmmm.2003.11.351

M3 - Conference article

AN - SCOPUS:2642540290

SN - 0304-8853

VL - 272-276

SP - 843

EP - 844

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

T2 - Proceedings of the International Conference on Magnetism

Y2 - 27 July 2003 through 1 August 2003

ER -