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

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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Synthesis and spectroscopic properties of LiIn(WO4)2 nanopowders and single crystals doped with chromium(III) ions

Open Physics ◽

10.2478/s11534-013-0316-z ◽

2013 ◽

Vol 11 (11) ◽

Author(s):

Tomasz Skibiński ◽

Hubert Fuks ◽

Sławomir Kaczmarek ◽

Tomasz Bodziony ◽

Krzysztof Hermanowicz ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Single Crystals ◽

Spectroscopic Data ◽

High Field ◽

Spectroscopic Properties ◽

Epr Spectra ◽

Higher Spin ◽

Field Lines ◽

The Magnetic Field

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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Synthesis and Magnetic Properties of β-Cu3Fe4(VO4)6 Single Crystals

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.233-234.137 ◽

2015 ◽

Vol 233-234 ◽

pp. 137-140

Author(s):

Dmitry A. Balaev ◽

Oleg A. Bayukov ◽

Evgeniy V. Eremin ◽

M.S. Molokeev ◽

Anatoly I. Pankrats ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Single Crystal ◽

Spin Glass ◽

Single Crystals ◽

Low Temperatures ◽

Freezing Temperature ◽

X Ray ◽

Glass State ◽

The Magnetic Field

β-Cu3Fe4(VO4)6 single crystals were synthesized. The X-ray, magnetic, Mössbauer, and EPR investigations of the crystals were fulfilled. It is established that single-crystal β-Cu3Fe4(VO4)6 is a spin glass at low temperatures. Freezing temperature varies considerably depending on the orientation of the magnetic field relative to the crystal axes. Spin-glass state is confirmed by the relaxation of the magnetization.

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Structural and magnetic properties of high magnetic-field-assisted hydrothermal synthesized Bi6Fe2Ti3O18 particles

Modern Physics Letters B ◽

10.1142/s0217984920500438 ◽

2019 ◽

Vol 34 (03) ◽

pp. 2050043

Author(s):

Shengman Liu

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Magnetic Fields ◽

Hydrothermal Method ◽

High Magnetic Field ◽

Growth Behavior ◽

High Magnetic Fields ◽

Structural And Magnetic Properties ◽

Ferromagnetic Ordering ◽

The Magnetic Field

[Formula: see text] (BFTO) nanoparticles were successfully synthesized by hydrothermal method in high magnetic fields of 0T, 2T, 4T, and 8T. High magnetic field can greatly affect the growth behavior of BFTO particles. The magnetic fields promote the BFTO nanoplates to grow along (001) direction and form a high-index {115} facet. The BFTO samples prepared in different magnetic fields are paramagnetic with the presence of an antiferromagnetic (AFM) and ferromagnetic ordering, and the AFM interaction weakens when the magnetic field is increased. In particular, the magnetization of the as-prepared BFTO particles is slightly enhanced with the increase in magnetic fields arising from the increased amount of bipyramid particles in favor of [Formula: see text]–[Formula: see text] plane alignment parallel to the magnetic field.

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Electrical-Transport, Magnetoresistance and Magnetic Properties of La1-xCaxMnO3 (x = 0.12 and 0.3) Single Crystals

Journal of Metastable and Nanocrystalline Materials ◽

10.4028/www.scientific.net/jmnm.28.65 ◽

2016 ◽

Vol 28 ◽

pp. 65-70

Author(s):

Tejas M. Tank ◽

Ashish Bodhaye ◽

Yakov M. Mukovskii ◽

Sankar P. Sanyal

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Transition Temperature ◽

Single Crystal ◽

Single Crystals ◽

Applied Magnetic Field ◽

Electrical Transport ◽

Floating Zone ◽

Metal To Insulator Transition ◽

The Magnetic Field

We report the electrical-transport and magnetic properties of the hole doped La0.7Ca0.3MnO3 (LCMO-1) and La0.88Ca0.12MnO3 (LCMO-2) single crystals, prepared using floating zone technique. The metal to insulator transition (TMI) occurs at 211 K along c-axis and TMI = 185 K along ab-plane for LCMO-1 single crystal. No electronic transition was observed over the whole temperature range under the magnetic field up to 8 T for LCMO-2 single crystal. It is observed that the TMI is higher along c-axis as compared to that in the ab-plane, consequently signifying more favorable hoping of electrons is along c-axis in LCMO-1. The ac-susceptibility measurement shows that ferromagnetic to paramagnetic transition temperature (TC) at 206 K for LCMO-1 and TC = 118 K for LCMO-2 single crystals which is seemingly related to notable change of resistance at 120 K in LCMO-2 single crystal. The maximum MR of 98% for LCMO-1 and 59% for LCMO-2 single crystals up to 8 T applied magnetic field along c-axis and ab-plane, respectively are observed.

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Field- and Stress-Induced Magnetic Anisotropy in Nanocrystalline Fe-Based and Amorphous Co-Based Alloys

Textures and Microstructures ◽

10.1155/tsm.32.289 ◽

1999 ◽

Vol 32 (1-4) ◽

pp. 289-294

Author(s):

V. A. Lukshina ◽

N. V. Dmitrieva ◽

A. P. Potapov

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Amorphous Alloy ◽

Magnetic Anisotropy ◽

Thermomechanical Treatment ◽

Nanocrystalline Alloy ◽

Complex Effect ◽

Induced Magnetic Anisotropy ◽

The Magnetic Field

For nanocrystalline alloy Fe73.5Cu1Nb3Si13.5B9 thermomechanical treatment was carried out simultaneously with nanocrystallizing annealing (1) or after it (2). It was shown that a change in magnetic properties for the case 1 is essentially greater than for the case 2. Complex effect of thermomagnetic and thermomechanical treatments on magnetic properties was studied in the above-mentioned nanocrystalline alloy as well as in the amorphous alloy Fe5Co70.6Si15B9.4., During the annealings both field and stress were aligned with the long side of the specimens. It was shown that the magnetic field, AC or DC, decreases an effect of loading. Moreover, the magnetic field, AC or DC, applied after stress-annealing can destroy the magnetic anisotropy already induced under load.

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Solar and stellar magnetic flux tubes

Symposium - International Astronomical Union ◽

10.1017/s0074180900083236 ◽

1996 ◽

Vol 176 ◽

pp. 201-216

Author(s):

Sami K. Solanki

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Magnetic Flux ◽

Large Range ◽

The Sun ◽

Flux Tubes ◽

Magnetic Elements ◽

Turbulent Pressure ◽

Magnetic Flux Tubes ◽

The Magnetic Field

The magnetic field of the Sun is mainly concentrated into intense magnetic flux tubes having field strengths of the order of 1 kG. In this paper an overview is given of the thermal and magnetic properties of these flux tubes, which are known to exhibit a large range in size, from the smallest magnetic elements to sunspots. Differences and similarities between the largest and smallest features are stressed. Some thoughts are also presented on how the properties of magnetic flux tubes are expected to scale from the solar case to that of solar-like stars. For example, it is pointed out that on giants and supergiants turbulent pressure may dominate over gas pressure as the main confining agent of the magnetic field. Arguments are also presented in favour of a highly complex magnetic geometry on very active stars. Thus the very large starspots seen in Doppler images probably are conglomerates of smaller (but possibly still sizable) spots.

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Magnetic and magnetoresistive properties of nanocomposites based on Co and SiO

International Journal of Modern Physics B ◽

10.1142/s0217979219501133 ◽

2019 ◽

Vol 33 (12) ◽

pp. 1950113 ◽

Cited By ~ 2

Author(s):

I. M. Pazukha ◽

Y. O. Shkurdoda ◽

A. M. Chornous ◽

L. V. Dekhtyaruk

Keyword(s):

Magnetic Field ◽

Thin Film ◽

Magnetic Properties ◽

Room Temperature ◽

Annealing Process ◽

Anisotropic Character ◽

Co Concentration ◽

Beam Method ◽

The Magnetic Field ◽

Film Nanocomposites

A series of thin-film nanocomposites based on ferromagnetic metal Co and insulator SiO were prepared using an electron-beam method. The magnetoresistive and magnetic properties of these structures deposited at room temperature and then annealed to 700 K were investigated. The results showed that at the Co concentration 40 [Formula: see text]x [Formula: see text] 60 at.%, thin-film nanocomposites exhibit magnetoresistance (MR) that is conditional on spin-dependent tunnelling of electrons. This range of concentrations corresponds to the prepercolation area according to the magnetic investigations. For samples with x [Formula: see text] 70 at.%, the anisotropic character of MR peculiar to the homogeneous ferromagnetic materials appears. According to the magnetic properties study, this range of concentrations corresponds to the area after transition through the percolation threshold. The annealing process in temperature range from 300 K to 700 K in the magnetic field slightly influenced the magnetoresistive properties of the thin-film nanocomposites based on Co and SiO for all range of concentrations.

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