Giant magnetostriction in an ordered Fe3Pt single crystal exhibiting a martensitic transformation

Kakeshita, Tomoyuki; Takeuchi, Tetsuya; Fukuda, Takashi; Tsujiguchi, Masato; Saburi, Toshio; Oshima, Ryuichiro; Muto, Shunsuke

doi:10.1063/1.1290694

Cited by 213 publications

(90 citation statements)

References 19 publications

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“…Recently, materials responsive to magnetic fields such as magnetostirictive materials [11,12] and ferrogels [13,14] as actuators has drawn considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a short carbon fiber/gel composite that responds to a magnetic field

Kimura¹,

Umehara²,

Kimura³

2010

Carbon

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A short carbon fiber (CF)/agarose gel composite in which short CFs were radially embedded in the gel matrix was fabricated. The composite was subjected to strong magnetic fields up to 8 T, to observe its deformation. The composite deformed so that the carbon fibers were aligned parallel to the magnetic field. The deformation was analyzed quantitatively in terms of the magnetic and elastic energies of the composite.

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“…Recently, materials responsive to magnetic fields such as magnetostirictive materials [11,12] and ferrogels [13,14] as actuators has drawn considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a short carbon fiber/gel composite that responds to a magnetic field

Kimura¹,

Umehara²,

Kimura³

2010

Carbon

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“…5,6) It is now well understood that a large magnetocrystalline anisotropy energy and small twinning shear of the FCT martensite are important for realizing the rearrangement of martensite variants under a magnetic field. However, the origin of such second-order-like transformation and the resulting small twinning shear are not clarified yet.…”

Section: Introductionmentioning

confidence: 99%

An Interpretation of Martensitic Transformation in L1<SUB>2</SUB>-Type Fe<SUB>3</SUB>Pt from Its Electronic Structure

Yamamoto

Fukuda

et al. 2010

Mater. Trans.

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Partly ordered Fe 3 Pt is one of ferromagnetic shape memory alloys exhibiting a large magnetic field-induced strain in its martensite phase formed by a second-order-like martensitic transformation from the L1 2 -type structure to the so-called FCT martensite (L6 0 -type structure). We have investigated the origin of this transformation from their electronic structures calculated in the present study. A characteristic feature in the electronic structure is the existence of a relatively high peak in the density of states of the minority spin band just below the Fermi energy. This peak splits into two peaks by tetragonal distortion, and one of them shifts to lower energy by the distortion, suggesting that the band Jahn-Teller effect is the main cause for the transformation.

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“…provide a large recoverable strain, which is achieved by a rearrangement of martensite variants (twin plates) under an applied stress. 1) In ferromagnetic SMAs (Ni 2 MnGa, [36][37][38] Fe-Pd, 2,39,40) Fe 3 Pt, 41) Co-Ni-Al, 42,43) Ni-Ga-Fe, 44) etc.) the shape deformation can be achieved by an applied magnetic field as well as stress.…”

Section: Magnetic Domains In Martensites and Correlationmentioning

confidence: 99%

Recent Advances in Domain Analysis

Murakami

Shindo

2005

Mater. Trans.

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Recent progress in domain analysis, which has been attained by the notable advancement of transmission electron microscopy (TEM), is reviewed by selecting certain topics related to displacive and magnetic phase transformations. Energy-filtered TEM, which separates the elastic scattering from the unwanted inelastic one, enabled us to explore the complex phenomena in the precursor state of martensitic transformations. In particular, the discovery of the peculiar nano-scaled domains in the parent phase has offered a novel picture on the lattice distortion in the precursor state and the subsequent nucleation process of a martensite. With respect to the analysis of magnetic domains, the authors have devised a technique that precisely evaluates the magnetization distribution based on electron holography. The method was applied to the complicated magnetic microstructure as observed near the Curie temperature and/or Néel temperature in hole-doped manganites. In addition to these topics, similarities of crystallographic domains between martensites and charge-ordered manganites, correlations between crystallographic microstructures (e.g., antiphase boundaries) and magnetic domains, and future challenging issues regarding domain analysis will also be mentioned.

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Giant magnetostriction in an ordered Fe3Pt single crystal exhibiting a martensitic transformation

Cited by 213 publications

References 19 publications

Fabrication of a short carbon fiber/gel composite that responds to a magnetic field

Fabrication of a short carbon fiber/gel composite that responds to a magnetic field

An Interpretation of Martensitic Transformation in L1<SUB>2</SUB>-Type Fe<SUB>3</SUB>Pt from Its Electronic Structure

Recent Advances in Domain Analysis

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