Über Manganbronze und über die Synthese magnetisierbarer Legierungen aus unmagnetischen Metallen

Heusler, Fr.

doi:10.1002/ange.19040170903

Cited by 87 publications

(23 citation statements)

References 1 publication

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“…Within the large class of Heusler alloys [1] Ni 2 MnGa is the first and most widely studied ferromagnet ðT c $350 KÞ that shows shape-memory effects and magnetic fieldinduced large strains [2,3]. Magnetic properties of these ferromagnetic shape-memory alloys (FSMA) are primarily due to the ordering of the manganese (Mn) moments according to neutron-diffraction measurements [4].…”

Section: Introductionmentioning

confidence: 99%

An X-ray study of non-zero nickel moment in a ferromagnetic shape-memory alloy

Islam

Haskel

Lang

et al. 2006

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

An X-ray study of non-zero nickel moment in a ferromagnetic shape-memory alloy

Islam

Haskel

Lang

et al. 2006

Journal of Magnetism and Magnetic Materials

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“…Advances in the understanding of the properties and processing of this material continue, despite its relatively simple, NiAs-type crystal structure, and the fact that ferromagnetism in MnBi was first reported over a century ago [2]. Key early studies were preformed by Guillaud [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…MnBi has several promising aspects as a candidate replacement for rare earth magnets. These include: (1) relatively inexpensive components [8], (2) high ordered moment and saturation magnetization of 0.58 MA m −1 or about 3.5 µ B per Mn at room temperature [9], (3) ferromagnetism that persists to 630 K (about 40 K higher than Nd 2 Fe 14 B) [3], (4) large and uniaxial magnetocrystalline anisotropy energy near 1 MJ m −3 at room temperature (moments along the c-axis), which increases upon heating above room temperature [10][11][12][13]. The observed increase in magnetic anisotropy and coercivity with increasing temperature is perhaps the most interesting, unique, and potentially important property of MnBi.…”

Section: Introductionmentioning

confidence: 99%

Symmetry-lowering lattice distortion at the spin reorientation in MnBi single crystals

et al. 2014

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Structural and physical properties determined by measurements on large single crystals of the anisotropic ferromagnet MnBi are reported. The findings support the importance of magnetoelastic effects in this material. X-ray diffraction reveals a structural phase transition at the spin reorientation temperature TSR = 90 K. The distortion is driven by magneto-elastic coupling, and upon cooling transforms the structure from hexagonal to orthorhombic. Heat capacity measurements show a thermal anomaly at the crystallographic transition, which is suppressed rapidly by applied magnetic fields. Effects on the transport and anisotropic magnetic properties of the single crystals are also presented. Increasing anisotropy of the atomic displacement parameters for Bi with increasing temperature above TSR is revealed by neutron diffraction measurements. It is likely that this is directly related to the anisotropic thermal expansion in MnBi, which plays a key role in the spin reorientation and magnetocrystalline anisotropy. The identification of the true ground state crystal structure reported here may be important for future experimental and theoretical studies of this permanent magnet material, which have to date been performed and interpreted using only the high temperature structure.

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“…Bulk MnAs undergoes a first order magneto-structural transition from a paramagnetic β-phase (D 2h orthorhombic symmetry) to a ferromagnetic α−phase (D 6h hexagonal symmetry) upon cooling through 40 °C with an abrupt ~ 1% increase in a lattice constant [11,12]. MnAs thin films can be grown epitaxially on lattice-matched silicon or GaAs at high temperatures.…”

mentioning

confidence: 99%