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The structure and magnetism of the new intermetallic compounds R2CoSi2 (R = Y, Gd, Tb, Dy)

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Title: The structure and magnetism of the new intermetallic compounds R2CoSi2 (R = Y, Gd, Tb, Dy)
Authors: Merlo, F.1, Pani, M.1, Napoletano, M.2, Canepa, F.2 canepaf@chimica.unige.it
Source: Journal of Alloys & Compounds. Jun2004, Vol. 372 Issue 1/2, p30-39. 10p.
Subjects: Crystallography, Magnetic properties, Hysteresis, Electromagnetic induction
Abstract: The crystal structure and the electric and magnetic properties of the new intermetallic compounds Y2CoSi2, Gd2CoSi2, Tb2CoSi2 and Dy2CoSi2 have been investigated. They crystallise in the monoclinic Sc2CoSi2 structure type (space group C2/m) showing two non-equivalent atomic positions for the rare earth atoms. While Y2CoSi2 is a Pauli paramagnet down to 4.2 K, Tb2CoSi2 and Dy2CoSi2 undergo a ferromagnetic transition at 185 and 126 K, respectively. A second magnetic transition can be observed from ac susceptibility measurements at 13 K for Tb2CoSi2 and 8.5 K for Dy2CoSi2 (the last one detected also from electrical resistivity data). Zero field cooled and field cooled measurements as well as non-linear ac susceptibility data suggest the hypothesis of a transition from a non-collinear ferromagnetic structure to a collinear ferromagnetic one at low temperatures. From the hysteresis cycle performed at 4.2 K, the remanence and the intrinsic coercive field for both compounds were obtained. [Copyright &y& Elsevier]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 13102723
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: The structure and magnetism of the new intermetallic compounds R<subscript>2</subscript>CoSi<subscript>2</subscript> (R = Y, Gd, Tb, Dy)
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  Data: <searchLink fieldCode="AR" term="%22Merlo%2C+F%2E%22">Merlo, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pani%2C+M%2E%22">Pani, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Napoletano%2C+M%2E%22">Napoletano, M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Canepa%2C+F%2E%22">Canepa, F.</searchLink><relatesTo>2</relatesTo><i> canepaf@chimica.unige.it</i>
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  Data: The crystal structure and the electric and magnetic properties of the new intermetallic compounds Y2CoSi2, Gd2CoSi2, Tb2CoSi2 and Dy2CoSi2 have been investigated. They crystallise in the monoclinic Sc2CoSi2 structure type (space group C2/m) showing two non-equivalent atomic positions for the rare earth atoms. While Y2CoSi2 is a Pauli paramagnet down to 4.2 K, Tb2CoSi2 and Dy2CoSi2 undergo a ferromagnetic transition at 185 and 126 K, respectively. A second magnetic transition can be observed from ac susceptibility measurements at 13 K for Tb2CoSi2 and 8.5 K for Dy2CoSi2 (the last one detected also from electrical resistivity data). Zero field cooled and field cooled measurements as well as non-linear ac susceptibility data suggest the hypothesis of a transition from a non-collinear ferromagnetic structure to a collinear ferromagnetic one at low temperatures. From the hysteresis cycle performed at 4.2 K, the remanence and the intrinsic coercive field for both compounds were obtained. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jallcom.2003.09.132
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 30
    Subjects:
      – SubjectFull: Crystallography
        Type: general
      – SubjectFull: Magnetic properties
        Type: general
      – SubjectFull: Hysteresis
        Type: general
      – SubjectFull: Electromagnetic induction
        Type: general
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      – TitleFull: The structure and magnetism of the new intermetallic compounds R2CoSi2 (R = Y, Gd, Tb, Dy)
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            NameFull: Canepa, F.
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            – D: 09
              M: 06
              Text: Jun2004
              Type: published
              Y: 2004
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