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Effect of the nonmagnetic layer in a Co/Cu/CoO trilayer structure on the exchange coupling in it / P. D. Kim [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 4. - P. 612-616, DOI 10.1134/S1063776111030058. - Cited References: 21 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPACER LAYER
BIAS
ANISOTROPY
Кл.слова (ненормированные):
Cobalt layers -- Copper layer -- Exchange bias -- Interlayer exchange coupling -- Nonmagnetic layers -- Oscillation amplitude -- Temperature dependence -- Temperature range -- Trilayer film -- Trilayer structure -- Cobalt -- Crystal structure -- Epitaxial films -- Hysteresis -- Hysteresis loops -- Magnetic materials -- Exchange coupling
Аннотация: The dependence of the exchange bias of epitaxial single-crystal Co/Cu/CoO trilayer films on the copper layer thickness and temperature is studied. The exchange bias of the hysteresis loops of the ferromagnetic cobalt layer as a function of the copper layer thickness is found to have a well-pronounced oscillating character. The oscillations manifest themselves over the entire temperature range in which an exchange bias takes place (77-220 K). The complex variation of the oscillation amplitude with the nonmagnetic layer thickness can be explained by the superposition of two interlayer exchange coupling oscillation periods (lambda(1) a parts per thousand 10-11 , lambda(2) a parts per thousand 20 ) having differentamplitudes and temperature dependences.

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Держатели документа:
[Kim, P. D.
Patrin, G. S.
Turpanov, I. A.
Khalyapin, D. L.
Marushchenko, D. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Yu, S. C.
Song, Yu. Y.] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea
[Yu, S. C.
Song, Yu. Y.] Chungbuk Natl Univ, Phys Program BK21, Cheongju 361763, South Korea
[Patrin, G. S.
Khalyapin, D. L.
Marushchenko, D. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
BK21 Physics Program, Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Kim, P. D.; Ким, Пётр Дементьевич; Yu, S. C.; Patrin, G. S.; Патрин, Геннадий Семёнович; Song, Y. Y.; Turpanov, I. A.; Турпанов, Игорь Александрович; Khalyapin, D. L.; Marushchenko, D. A.; Марущенко, Дмитрий Анатольевич
}
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Observation of nonmonotonic oscillatory interlayer exchange coupling in Co/Cu/CoO films with varying Cu spacer thickness / Y. Y. Song [et al.] // J. Appl. Phys. - 2008. - Vol. 103: 52nd Annual Conference on Magnetism and Magnetic Materials (NOV 05-09, 2007, Tampa, FL), Is. 7. - Ст. 07C112, DOI 10.1063/1.2831390. - Cited References: 20 . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
GIANT MAGNETORESISTANCE
   MAGNETIC-ANISOTROPY
   LAYERS
   BIAS
   SUPERLATTICES
   MULTILAYERS
   TRILAYERS
Кл.слова (ненормированные):
Copper -- Film thickness -- Thermal effects -- CoCuCoO films -- Oscillatory interlayer exchange coupling. -- Metallic films
Аннотация: We report our experimental observation of interlayer exchange coupling phenomena in CoO/Cu/Co trilayers with systematic variation of Cu spacer layer thickness as well as temperature. It has been found that there exists a clear indication of nonmonotonically varying oscillatory interlayer exchange coupling. The amplitude of oscillation increases, reaches to the maximum, and decreases with increasing Cu spacer thickness from 1 to 16 atomic layers for all temperature ranges between 70 and 200 K. (c) 2008 American Institute of Physics.

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Держатели документа:
[Song, Young-Yeal
Kim, Dong-Hyun
Yu, Seong-Cho] Chungbuk Natl Univ, BK21 Phys Program, Cheongju 361763, South Korea
[Song, Young-Yeal
Kim, Dong-Hyun
Yu, Seong-Cho] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea
[Kim, Petr D.
Turpanov, Igor Alexandrovic
Lee, Liudmila Alexeevna] SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Buzmakov, Afanasy Egorovic] Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
[Lee, Kyu Won] Korea Res Inst Stand & Sci, Taejon 305340, South Korea
ИФ СО РАН
BK21 Physics Program, Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Kirensky Institute of Physics SB RAS, Academgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical University, Kirenskogo, 26, Krasnoyarsk, 660074, Russian Federation
Korea Research Institute of Standard and Science, Taejon 305-340, South Korea

Доп.точки доступа:
Song, Y. Y.; Kim, D. H.; Yu, S. C.; Kim, P. D.; Ким, Пётр Дементьевич; Turpanov, I. A.; Турпанов, Игорь Александрович; Lee, L. A.; Ли, Людмила Алексеевна; Buzmakov, A. E.; Lee, K. W.
}
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Gorban, A.
Codon usage trajectories and 7-cluster structure of 143 complete bacterial genornic sequences / A. . Gorban, T. . Popova, A. . Zinovyev // Physica A. - 2005. - Vol. 353. - P. 365-387, DOI 10.1016/j.physa.2005.01.043. - Cited References: 46 . - ISSN 0378-4371

РУБ Physics, Multidisciplinary
Рубрики:
DNA-BASE COMPOSITION
   ASYMMETRIC SUBSTITUTION PATTERNS
   PROTEIN-CODING REGIONS
   MICROBIAL GENOMES
   GENE IDENTIFICATION
   MARKOV-MODELS
   G+C CONTENT
   BIAS
   PREDICTION
   SELECTION
Кл.слова (ненормированные):
genome -- cluster -- codon usage -- correlations -- entropy -- mean field -- Cluster -- Codon usage -- Correlations -- Entropy -- Genome -- Mean field -- Approximation theory -- Correlation methods -- Database systems -- Entropy -- Functions -- Genes -- Mathematical models -- Clusters -- Codon usage -- Genomes -- Mean field -- Bacteria
Аннотация: Three results are presented. First, we prove the existence of a universal 7-cluster structure in all 143 completely sequenced bacterial genomes available in Genbank in August 2004, and explained its properties. The 7-cluster structure is responsible for the main part of sequence heterogeneity in bacterial genomes. In this sense, our 7 clusters is the basic model of bacterial genome sequence. We demonstrated that there are four basic "pure" types of this model, observed in nature: "parallel triangles", "perpendicular triangles", degenerated case and the flower-like type. Second, we answered the question: how big are the position-specific information and the contribution connected with correlations between nucleotide. The accuracy of the mean-field (context-free) approximation is estimated for bacterial genomes. We show that codon us-age of bacterial genomes is a multi-linear function of their genomic G+C-content with high accuracy (more precisely, by two similar functions, one for eubacterial genomes and the other one for archaea). Description of these two codon-usage trajectories is the third result. All 143 cluster animated 3D-scatters are collected in a database and is made available on our web-site: http://www.ihes.fr/similar to zinovyev/7clusters. (c) 2005 Elsevier B.V. All rights reserved.

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Держатели документа:
Univ Leicester, Dept Math, Leicester LE1 7RH, Leics, England
RAS, SB, Inst Computat Modelling, Krasnoyarsk, Russia
Bures Sur Yvette & Bioinformat Serv Inst Curie, Inst Hautes Etudes Sci, Paris, France
ИВМ СО РАН
Department of Mathematics, University of Leicester, Leicester, University Road, Leicester LE1 7RH, United Kingdom
Institute of Computational Modelling, SB RAS, Krasnoyarsk, Russian Federation
Institut des Hautes Etudes Scientifiques, Bures-sur-Yvette and Bioinformatics Service of Institut Curie, Paris, France

Доп.точки доступа:
Popova, T.; Zinovyev, A.
}
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