ОСОБЕННОСТИ НИЗКОТЕМПЕРАТУРНОГО ТУННЕЛЬНОГО МАГНИТОСОПРОТИВЛЕНИЯ ПРЕССОВАННЫХ НАНОПОРОШКОВ ДИОКСИДА ХРОМА CRO2

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ОСОБЕННОСТИ НИЗКОТЕМПЕРАТУРНОГО ТУННЕЛЬНОГО МАГНИТОСОПРОТИВЛЕНИЯ ПРЕССОВАННЫХ НАНОПОРОШКОВ ДИОКСИДА ХРОМА CRO2. / Kolesnichenko, Yu A.; Dalakova, N. V.; Beliayev, E. Yu; Bludov, O. M.; Horielyi, V. A.; Osmolowskaya, O. M.; Osmolowsky, M.

в: ФИЗИКА НИЗКИХ ТЕМПЕРАТУР, Том 43, № 5, 01.05.2017, стр. 772-781.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{d9f37c78eb13415588b0950b3fe7b3c6,

title = "ОСОБЕННОСТИ НИЗКОТЕМПЕРАТУРНОГО ТУННЕЛЬНОГО МАГНИТОСОПРОТИВЛЕНИЯ ПРЕССОВАННЫХ НАНОПОРОШКОВ ДИОКСИДА ХРОМА CRO2",

abstract = "Resistive and low-temperature magnetoresistive properties of pressed powders of ferromagnetic halfmetal chromium dioxide (CrO2) with shape anisotropy of nanoparticles are studied. And we also studied the influence of Fe impurity on the value of tunneling resistance and magnetoresistance in CrO2 powders. It is found that the Fe impurity reduces resistance and tunneling magnetoresistance in chromium dioxide. We suggest that such a decrease of magnetoresistance in solid solution Cr1-xFexO2 is due to the formation of additional localized states at the iron impurities in a tunnel barrier. We found the influence of the speed of the magnetic field changing on the form of lowtemperature tunneling magnetoresistance hysteretic loops in Cr1-xFexO powder. It is shown that the form of low-temperature magnetoresistance hysteresis depends on the relaxation rate of the magnetic moments of nanoparticles to an equilibrium state. The possible reasons for such dependence are discussed. PACS: 75.47.-m Magnetotransport phenomena; materials for magnetotransport; 75.47.Lx Magnetic oxides; 75.50.Ss Magnetic recording materials; 72.25.-b Spin polarized transport.",

keywords = "Blocked state, Chromium dioxide, Granular magnetic materials, Half metals, Tunnel magnetoresistance",

author = "Kolesnichenko, {Yu A.} and Dalakova, {N. V.} and Beliayev, {E. Yu} and Bludov, {O. M.} and Horielyi, {V. A.} and Osmolowskaya, {O. M.} and M. Osmolowsky",

year = "2017",

month = may,

day = "1",

language = "русский",

volume = "43",

pages = "772--781",

journal = "Low Temperature Physics",

issn = "1063-777X",

publisher = "American Institute of Physics",

number = "5",

}

RIS

TY - JOUR

T1 - ОСОБЕННОСТИ НИЗКОТЕМПЕРАТУРНОГО ТУННЕЛЬНОГО МАГНИТОСОПРОТИВЛЕНИЯ ПРЕССОВАННЫХ НАНОПОРОШКОВ ДИОКСИДА ХРОМА CRO2

AU - Kolesnichenko, Yu A.

AU - Dalakova, N. V.

AU - Beliayev, E. Yu

AU - Bludov, O. M.

AU - Horielyi, V. A.

AU - Osmolowskaya, O. M.

AU - Osmolowsky, M.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Resistive and low-temperature magnetoresistive properties of pressed powders of ferromagnetic halfmetal chromium dioxide (CrO2) with shape anisotropy of nanoparticles are studied. And we also studied the influence of Fe impurity on the value of tunneling resistance and magnetoresistance in CrO2 powders. It is found that the Fe impurity reduces resistance and tunneling magnetoresistance in chromium dioxide. We suggest that such a decrease of magnetoresistance in solid solution Cr1-xFexO2 is due to the formation of additional localized states at the iron impurities in a tunnel barrier. We found the influence of the speed of the magnetic field changing on the form of lowtemperature tunneling magnetoresistance hysteretic loops in Cr1-xFexO powder. It is shown that the form of low-temperature magnetoresistance hysteresis depends on the relaxation rate of the magnetic moments of nanoparticles to an equilibrium state. The possible reasons for such dependence are discussed. PACS: 75.47.-m Magnetotransport phenomena; materials for magnetotransport; 75.47.Lx Magnetic oxides; 75.50.Ss Magnetic recording materials; 72.25.-b Spin polarized transport.

AB - Resistive and low-temperature magnetoresistive properties of pressed powders of ferromagnetic halfmetal chromium dioxide (CrO2) with shape anisotropy of nanoparticles are studied. And we also studied the influence of Fe impurity on the value of tunneling resistance and magnetoresistance in CrO2 powders. It is found that the Fe impurity reduces resistance and tunneling magnetoresistance in chromium dioxide. We suggest that such a decrease of magnetoresistance in solid solution Cr1-xFexO2 is due to the formation of additional localized states at the iron impurities in a tunnel barrier. We found the influence of the speed of the magnetic field changing on the form of lowtemperature tunneling magnetoresistance hysteretic loops in Cr1-xFexO powder. It is shown that the form of low-temperature magnetoresistance hysteresis depends on the relaxation rate of the magnetic moments of nanoparticles to an equilibrium state. The possible reasons for such dependence are discussed. PACS: 75.47.-m Magnetotransport phenomena; materials for magnetotransport; 75.47.Lx Magnetic oxides; 75.50.Ss Magnetic recording materials; 72.25.-b Spin polarized transport.

KW - Blocked state

KW - Chromium dioxide

KW - Granular magnetic materials

KW - Half metals

KW - Tunnel magnetoresistance

UR - http://www.scopus.com/inward/record.url?scp=85016416330&partnerID=8YFLogxK

M3 - статья

AN - SCOPUS:85016416330

VL - 43

SP - 772

EP - 781

JO - Low Temperature Physics

JF - Low Temperature Physics

SN - 1063-777X

IS - 5

ER -

ID: 45105086