Magnetoresistance effect in the fluctuating-valence BaSmFe2O5+w system

J. Nakamura; J. Lindén; M. Karppinen; H. Yamauchi

doi:10.1063/1.1310170

Magnetoresistance effect in the fluctuating-valence BaSmFe₂O_5+w system

J. Nakamura^*, J. Lindén, M. Karppinen, H. Yamauchi

^*Tämän työn vastaava kirjoittaja

Fysiikka

Tutkimustuotos: Lehtiartikkeli › Artikkeli › Tieteellinen › vertaisarvioitu

13 Sitaatiot (Scopus)

Abstrakti

The occurrence of negative magnetoresistance (MR) in semiconductive BaSmFe₂O_5+w double-perovskite samples is demonstrated. A peak in the MR value was observed at the Verwey-type transition temperature. The transition signifies the charge separation of the Fe^2.5+ fluctuating mixed valence state into high-spin Fe²⁺ and Fe_3-. The samples were ferrimagnetic with a Curie temperature of ∼ 710 K. Upon oxidizing/reducing the samples the size of the MR peak and the temperature at which the peak occurred varied. The largest MR value observed was 1.4% at 7 T.

Alkuperäiskieli	Englanti
Sivut	1683-1685
Sivumäärä	3
Julkaisu	Applied Physics Letters
Vuosikerta	77
Numero	11
DOI - pysyväislinkit	https://doi.org/10.1063/1.1310170
Tila	Julkaistu - 11 syysk. 2000
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

Pääsy asiakirjaan

10.1063/1.1310170

Muut tiedostot ja linkit

Link to publication in Scopus

Viittausmuodot

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title = "Magnetoresistance effect in the fluctuating-valence BaSmFe2O5+w system",

abstract = "The occurrence of negative magnetoresistance (MR) in semiconductive BaSmFe2O5+w double-perovskite samples is demonstrated. A peak in the MR value was observed at the Verwey-type transition temperature. The transition signifies the charge separation of the Fe2.5+ fluctuating mixed valence state into high-spin Fe2+ and Fe3-. The samples were ferrimagnetic with a Curie temperature of ∼ 710 K. Upon oxidizing/reducing the samples the size of the MR peak and the temperature at which the peak occurred varied. The largest MR value observed was 1.4% at 7 T.",

author = "J. Nakamura and J. Lind{\'e}n and M. Karppinen and H. Yamauchi",

year = "2000",

month = sep,

day = "11",

doi = "10.1063/1.1310170",

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journal = "Applied Physics Letters",

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T1 - Magnetoresistance effect in the fluctuating-valence BaSmFe2O5+w system

AU - Nakamura, J.

AU - Lindén, J.

AU - Karppinen, M.

AU - Yamauchi, H.

PY - 2000/9/11

Y1 - 2000/9/11

N2 - The occurrence of negative magnetoresistance (MR) in semiconductive BaSmFe2O5+w double-perovskite samples is demonstrated. A peak in the MR value was observed at the Verwey-type transition temperature. The transition signifies the charge separation of the Fe2.5+ fluctuating mixed valence state into high-spin Fe2+ and Fe3-. The samples were ferrimagnetic with a Curie temperature of ∼ 710 K. Upon oxidizing/reducing the samples the size of the MR peak and the temperature at which the peak occurred varied. The largest MR value observed was 1.4% at 7 T.

AB - The occurrence of negative magnetoresistance (MR) in semiconductive BaSmFe2O5+w double-perovskite samples is demonstrated. A peak in the MR value was observed at the Verwey-type transition temperature. The transition signifies the charge separation of the Fe2.5+ fluctuating mixed valence state into high-spin Fe2+ and Fe3-. The samples were ferrimagnetic with a Curie temperature of ∼ 710 K. Upon oxidizing/reducing the samples the size of the MR peak and the temperature at which the peak occurred varied. The largest MR value observed was 1.4% at 7 T.

UR - http://www.scopus.com/inward/record.url?scp=0000012853&partnerID=8YFLogxK

U2 - 10.1063/1.1310170

DO - 10.1063/1.1310170

M3 - Article

AN - SCOPUS:0000012853

SN - 0003-6951

VL - 77

SP - 1683

EP - 1685

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

ER -