Effects of magnetic seed-layers on the structural and magnetic properties of Co 2 MnSi Heusler alloy

Taejin Bae, Sangho Lee, Jongill Hong, Dong Ryeol Lee, Jaesung Roh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigated the structural and magnetic properties of Co 2 MnSi deposited on Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers at room temperature before and after annealing at various temperatures up to 500 °C. The lattice misfits between Co 2 MnSi and Co 90 Fe 10 and between Co 2 MnSi and Co 50 Fe 50 were expected to be 2.0% and 0.5%, respectively, which are small enough to allow an epitaxial relation or to promote a texture between layers. The Co 2 MnSi grown on the Co 90 Fe 10 seed-layer transformed from an A2 to a B2 structure when it was annealed at a temperature as low as 350 °C, evidenced by the (200) peak. The transformation of the Co 2 MnSi to an L2 1 structure did not take place until it was annealed at 500 °C. The soft magnetic properties of the Co 2 MnSi on the Co 90 Fe 10 were substantially improved. In contrast, the Co 2 MnSi prepared on the Co 50 Fe 50 seed-layer did not transform to L2 1 even after annealing at 500 °C. Instead, it showed a B2 structure. The Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers found to be useful not only to facilitate the transformation to ordered phases but to improve the soft magnetism of Co 2 MnSi, which makes feasible for the use of Co 2 MnSi in applications such as magnetic read heads, magnetic random access memories, and spin transistors.

Original languageEnglish
Pages (from-to)577-581
Number of pages5
JournalMaterials Chemistry and Physics
Volume136
Issue number2-3
DOIs
Publication statusPublished - 2012 Oct 15

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Seed
Structural properties
seeds
Magnetic properties
magnetic properties
Annealing
Magnetic heads
Magnetism
annealing
Temperature
random access memory
Transistors
Textures
Data storage equipment
transistors
textures
temperature
room temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Bae, Taejin ; Lee, Sangho ; Hong, Jongill ; Lee, Dong Ryeol ; Roh, Jaesung. / Effects of magnetic seed-layers on the structural and magnetic properties of Co 2 MnSi Heusler alloy In: Materials Chemistry and Physics. 2012 ; Vol. 136, No. 2-3. pp. 577-581.
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abstract = "We investigated the structural and magnetic properties of Co 2 MnSi deposited on Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers at room temperature before and after annealing at various temperatures up to 500 °C. The lattice misfits between Co 2 MnSi and Co 90 Fe 10 and between Co 2 MnSi and Co 50 Fe 50 were expected to be 2.0{\%} and 0.5{\%}, respectively, which are small enough to allow an epitaxial relation or to promote a texture between layers. The Co 2 MnSi grown on the Co 90 Fe 10 seed-layer transformed from an A2 to a B2 structure when it was annealed at a temperature as low as 350 °C, evidenced by the (200) peak. The transformation of the Co 2 MnSi to an L2 1 structure did not take place until it was annealed at 500 °C. The soft magnetic properties of the Co 2 MnSi on the Co 90 Fe 10 were substantially improved. In contrast, the Co 2 MnSi prepared on the Co 50 Fe 50 seed-layer did not transform to L2 1 even after annealing at 500 °C. Instead, it showed a B2 structure. The Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers found to be useful not only to facilitate the transformation to ordered phases but to improve the soft magnetism of Co 2 MnSi, which makes feasible for the use of Co 2 MnSi in applications such as magnetic read heads, magnetic random access memories, and spin transistors.",
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Effects of magnetic seed-layers on the structural and magnetic properties of Co 2 MnSi Heusler alloy . / Bae, Taejin; Lee, Sangho; Hong, Jongill; Lee, Dong Ryeol; Roh, Jaesung.

In: Materials Chemistry and Physics, Vol. 136, No. 2-3, 15.10.2012, p. 577-581.

Research output: Contribution to journalArticle

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T1 - Effects of magnetic seed-layers on the structural and magnetic properties of Co 2 MnSi Heusler alloy

AU - Bae, Taejin

AU - Lee, Sangho

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AU - Lee, Dong Ryeol

AU - Roh, Jaesung

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N2 - We investigated the structural and magnetic properties of Co 2 MnSi deposited on Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers at room temperature before and after annealing at various temperatures up to 500 °C. The lattice misfits between Co 2 MnSi and Co 90 Fe 10 and between Co 2 MnSi and Co 50 Fe 50 were expected to be 2.0% and 0.5%, respectively, which are small enough to allow an epitaxial relation or to promote a texture between layers. The Co 2 MnSi grown on the Co 90 Fe 10 seed-layer transformed from an A2 to a B2 structure when it was annealed at a temperature as low as 350 °C, evidenced by the (200) peak. The transformation of the Co 2 MnSi to an L2 1 structure did not take place until it was annealed at 500 °C. The soft magnetic properties of the Co 2 MnSi on the Co 90 Fe 10 were substantially improved. In contrast, the Co 2 MnSi prepared on the Co 50 Fe 50 seed-layer did not transform to L2 1 even after annealing at 500 °C. Instead, it showed a B2 structure. The Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers found to be useful not only to facilitate the transformation to ordered phases but to improve the soft magnetism of Co 2 MnSi, which makes feasible for the use of Co 2 MnSi in applications such as magnetic read heads, magnetic random access memories, and spin transistors.

AB - We investigated the structural and magnetic properties of Co 2 MnSi deposited on Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers at room temperature before and after annealing at various temperatures up to 500 °C. The lattice misfits between Co 2 MnSi and Co 90 Fe 10 and between Co 2 MnSi and Co 50 Fe 50 were expected to be 2.0% and 0.5%, respectively, which are small enough to allow an epitaxial relation or to promote a texture between layers. The Co 2 MnSi grown on the Co 90 Fe 10 seed-layer transformed from an A2 to a B2 structure when it was annealed at a temperature as low as 350 °C, evidenced by the (200) peak. The transformation of the Co 2 MnSi to an L2 1 structure did not take place until it was annealed at 500 °C. The soft magnetic properties of the Co 2 MnSi on the Co 90 Fe 10 were substantially improved. In contrast, the Co 2 MnSi prepared on the Co 50 Fe 50 seed-layer did not transform to L2 1 even after annealing at 500 °C. Instead, it showed a B2 structure. The Co 90 Fe 10 and Co 50 Fe 50 ferromagnetic seed-layers found to be useful not only to facilitate the transformation to ordered phases but to improve the soft magnetism of Co 2 MnSi, which makes feasible for the use of Co 2 MnSi in applications such as magnetic read heads, magnetic random access memories, and spin transistors.

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