Phase transitions in ferromagnetic Ni2+xMn1-xGa alloys with regard for the modulation order parameter

V. D. Buchel'nikov; A. T. Zayak; A. N. Vasil'ev; D. L. Dalidovich; V. G. Shavrov; T. Takagi; V. V. Khovailo

doi:10.1134/1.1385642

Phase transitions in ferromagnetic Ni_2+xMn_1-xGa alloys with regard for the modulation order parameter

V. D. Buchel'nikov, A. T. Zayak, A. N. Vasil'ev, D. L. Dalidovich, V. G. Shavrov, T. Takagi, V. V. Khovailo

Center for Fundamental Research on Nuclear Decommissioning (CFReND)

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Abstract

The phase diagram of ferromagnetic alloys Ni_2+xMn_1-xGa is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.

Original language	English
Pages (from-to)	1010-1018
Number of pages	9
Journal	Journal of Experimental and Theoretical Physics
Volume	92
Issue number	6
DOIs	https://doi.org/10.1134/1.1385642
Publication status	Published - 2001 Jun

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Physics and Astronomy(all)

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@article{defee82efd984607a9f62d2a8fff65df,

title = "Phase transitions in ferromagnetic Ni2+xMn1-xGa alloys with regard for the modulation order parameter",

abstract = "The phase diagram of ferromagnetic alloys Ni2+xMn1-xGa is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.",

author = "Buchel'nikov, {V. D.} and Zayak, {A. T.} and Vasil'ev, {A. N.} and Dalidovich, {D. L.} and Shavrov, {V. G.} and T. Takagi and Khovailo, {V. V.}",

note = "Funding Information: This work was supported by the Russian Foundation for Basic Research, project no. 99-02-18247; by the Ministry for Education, project no. 97-0-7.0-11; and by the Russian Universities program.",

year = "2001",

month = jun,

doi = "10.1134/1.1385642",

language = "English",

volume = "92",

pages = "1010--1018",

journal = "Journal of Experimental and Theoretical Physics",

issn = "1063-7761",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "6",

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TY - JOUR

T1 - Phase transitions in ferromagnetic Ni2+xMn1-xGa alloys with regard for the modulation order parameter

AU - Buchel'nikov, V. D.

AU - Zayak, A. T.

AU - Vasil'ev, A. N.

AU - Dalidovich, D. L.

AU - Shavrov, V. G.

AU - Takagi, T.

AU - Khovailo, V. V.

N1 - Funding Information: This work was supported by the Russian Foundation for Basic Research, project no. 99-02-18247; by the Ministry for Education, project no. 97-0-7.0-11; and by the Russian Universities program.

PY - 2001/6

Y1 - 2001/6

N2 - The phase diagram of ferromagnetic alloys Ni2+xMn1-xGa is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.

AB - The phase diagram of ferromagnetic alloys Ni2+xMn1-xGa is reconstructed on the basis of temperature dependences of the resistance. It is seen from this diagram that for small x, structural transitions from the cubic to the tetragonal phase are preceded by structural transformations in the cubic phase. In the framework of the phenomenological Landau theory of phase transitions, phase diagrams of the structural and magnetic phase transitions in these alloys are analyzed with regard for the modulation order parameter. It is shown that premartensitic and postmartensitic phase transitions related to the appearance of the modulated structure can occur along with martensitic transformations. The strain and modulation order parameters substantially affect the magnetic phase transitions via the interaction with the magnetic order parameter.

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DO - 10.1134/1.1385642

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SN - 1063-7761

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EP - 1018

JO - Journal of Experimental and Theoretical Physics

JF - Journal of Experimental and Theoretical Physics

IS - 6

ER -

Phase transitions in ferromagnetic Ni_2+xMn_1-xGa alloys with regard for the modulation order parameter

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