Crystal Perfection of Silicon Single Crystals Grown by the Magnetic‐Field‐Applied Czochralski Method

AbstractLiIn(WO4)2 single crystals and nanopowders doped with chromium(III) ions were synthesized and investigated, including their EPR spectra and magnetic properties. The EPR spectra have shown low and high field lines attributed to isolated chromium ions with an electron spin S=3/2 and complex chromium centers with higher spin value, respectively. Magnetic susceptibility measurements revealed an almost linear dependence on the magnetic field. The electron resonance and magnetic properties have been related to the structural and spectroscopic data of the studied material.

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Study of the Effect of Cation Non-Stoichiometry of (La0.85Sr0.15)yMnO3 Manganite Single Crystals on the Magnetic Properties

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.194.108 ◽

2012 ◽

Vol 194 ◽

pp. 108-111

Author(s):

Dmitry Shulyatev ◽

Mariya Lyange ◽

Anna Pestun ◽

Yakov M. Mukovskii ◽

Eun Sang Choi ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Electron Transport ◽

Single Crystals ◽

Orbital Ordering ◽

Electron Transport Properties ◽

Mn Content ◽

Ferromagnetic Ordering ◽

Two Peaks ◽

The Magnetic Field

The influence of cation inhomogeneity on magnetic and electron transport properties of (La0.85Sr0.15)yMnO3 (y=0.92-0.97) single crystals were studied. It was found that both the temperature of ferromagnetic ordering TC and the temperature of orbital ordering TOO are increased with the Mn content decreasing. For all six samples studied two peaks on magnetoresistance curves were observed: the first near TC and the second close to TOO. The magnetic field does not affect the position of the former maximum, while it moves the latter towards lower temperatures.

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Magnetic Shape Memory - Polymer Hybrids

Materials Science Forum ◽

10.4028/www.scientific.net/msf.879.133 ◽

2016 ◽

Vol 879 ◽

pp. 133-138 ◽

Cited By ~ 1

Author(s):

Ilkka Aaltio ◽

Frans Nilsén ◽

Joonas Lehtonen ◽

Yan Ling Ge ◽

Steven Spoljaric ◽

...

Keyword(s):

Magnetic Field ◽

Shape Memory ◽

Single Crystals ◽

Magnetic Particles ◽

Shape Change ◽

Shape Memory Polymer ◽

Raw Material ◽

Magnetic Shape Memory ◽

Polymer Hybrids ◽

The Magnetic Field

Martensitic Ni-Mn-Ga based alloys are known for the Magnetic Shape Memory (MSM) effect, which upon application of an external magnetic field can generate a strain up to 12 % depending on the microstructure of the martensite. The MSM effect occurs by rearrangement of the martensite variants, which is most advantageous in single crystals. Single crystals are, however, rather tedious to produce and there has been attempts to achieve MSM effect in polycrystals. However, in polycrystals the magnetic field induced shape change remains low as compared to single crystals. As an alternative to the former, hybrid MSM materials offer several advantages. When compared to single crystals, hybrids have extended freedom of shaping, lower raw material price, relatively large MSM strain and easier manufacturability. Embedding MSM particles into a suitable polymer matrix results in actuation function or good vibration damping performance. In the present study we report on the mechanical, structural and magnetic properties of MSM polymer hybrids, which are prepared by mixing gas-atomized Ni-Mn-Ga MSM powder into epoxy matrix and aligning the magnetic particles in a magnetic field.

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Paramagnetic resonance in copper sulphate

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1950.0066 ◽

1950 ◽

Vol 201 (1066) ◽

pp. 366-377 ◽

Cited By ~ 64

Keyword(s):

Magnetic Field ◽

Exchange Interaction ◽

Single Crystals ◽

Copper Sulphate ◽

Wave Length ◽

Resonance Absorption ◽

Paramagnetic Resonance ◽

Exchange Frequency ◽

Susceptibility Data ◽

The Magnetic Field

Paramagnetic resonance absorption in single crystals of copper sulphate pentahydrate has been investigated at wave-lengths of 3.04, 1.23 and 0.85 cm. Only one absorption line is found at wave-lengths of 3.04 and 1.23 cm., and the position agrees with that calculated from susceptibility data. Two lines would be expected theoretically for many orientations of the crystal in the magnetic field, corresponding to the two inequivalent Cu ++ ions in unit cell. At 0.85 cm. wave-length two lines are found under the appropriate conditions but not at longer wave-lengths. This is interpreted in terms of exchange interaction between dissimilar ions, and the exchange frequency is estimated at 0.15 cm. -1 . Other effects of exchange interaction in this salt are discussed.

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