Spiral spin structure in the Heisenberg pyrochlore magnetCdCr2O4

2007 ◽  
Vol 75 (10) ◽  
Author(s):  
M. Matsuda ◽  
M. Takeda ◽  
M. Nakamura ◽  
K. Kakurai ◽  
A. Oosawa ◽  
...  
Keyword(s):  
Spin Structure ◽  
Spiral Spin

Effect of Diamagnetic A2+ Substitution on the Magnetic and Ferroelectric Properties of the Bi1−xAxFeO3 Multiferroics

2007 ◽  
Vol 1034 ◽  
Author(s):  
V. A. Khomchenko ◽  
D. A. Kiselev ◽  
J. M. Vieira ◽  
Li Jian ◽  
A. M. L. Lopes ◽  
...  
Keyword(s):  
Spin Structure ◽  
Ionic Radius ◽  
Ferroelectric Properties ◽  
Piezoresponse Force Microscopy ◽  
Weak Ferromagnetism ◽  
Force Microscopy ◽  
Microscopy Data ◽  
A Site ◽  
Induced Changes ◽  
Spiral Spin

AbstractInvestigation of crystal structure, magnetic and local ferroelectric properties of the diamagnetically-doped Bi1−xAxFeO3 (A= Ca, Sr, Pb, Ba; x= 0.2, 0.3) ceramic samples has been carried out. It has been shown that the solid solutions have a rhombohedrally distorted perovskite structure described by the space group R3c. Piezoresponse force microscopy data have revealed the existence of the spontaneous ferroelectric polarization in the samples at room temperature. Magnetization measurements have shown that the magnetic state of these compounds is determined by the ionic radius of the substituting elements. A-site substitution with the biggest ionic radius ions has been found to suppress the spiral spin structure of BiFeO3 and to result in the appearance of weak ferromagnetism. The magnetic properties have been discussed in terms of doping- induced changes in the magnetic anisotropy.

lnTDivergence in the Spiral Spin Structure

1970 ◽  
Vol 25 (26) ◽  
pp. 1761-1764 ◽  
Author(s):  
Tadashi Arai
Keyword(s):  
Spin Structure ◽  
Spiral Spin

Correlation between Ionic Radius of Substituting Element and Magnetic Properties of Bi1-xAxFeO3-x/2 (A= Ca, Sr, Pb, Ba) Multiferroics

2009 ◽  
Vol 152-153 ◽  
pp. 131-134 ◽  
Author(s):  
V.A. Khomchenko ◽  
Michael Kopcewicz ◽  
Armandina M. Lima Lopes ◽  
Yuri G. Pogorelov ◽  
J.P. Araujo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Spin Structure ◽  
Ionic Radius ◽  
Oxygen Vacancies ◽  
Magnetic State ◽  
Weak Ferromagnetism ◽  
Host Lattice ◽  
A Site ◽  
Spiral Spin

Investigation of crystal structure and magnetic properties of the diamagnetically- substituted Bi1-xAxFeO3-x/2 (A= Ca, Sr, Pb, Ba; x= 0.2, 0.3) polycrystalline samples has been carried out. It has been shown that the heterovalent A2+ substitution result in the formation of oxygen vacancies in the host lattice. The solid solutions have been found to possess a rhombohedrally distorted perovskite structure described by the space group R3c. Magnetization measurements have shown that the magnetic state of these compounds is determined by the ionic radius of the substituting elements. A-site substitution with the biggest ionic radius ions has been found to suppress the spiral spin structure of BiFeO3 giving rise to the appearance of weak ferromagnetism.

scholarly journals Peculiar magnetism of BiFeO3 nanoparticles with size approaching the period of the spiral spin structure

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Fengzhen Huang ◽  
Zhijun Wang ◽  
Xiaomei Lu ◽  
Junting Zhang ◽  
Kangli Min ◽  
...  
Keyword(s):  
Spin Structure ◽  
Bifeo3 Nanoparticles ◽  
Spiral Spin

scholarly journals Effect of octahedron tilt on structure and magnetic properties of bismuth ferrite

2020 ◽  
Author(s):  
Yang Hong ◽  
Jun Li ◽  
Han Bai ◽  
Zhenjia Song ◽  
Ming Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spin Structure ◽  
Bismuth Ferrite ◽  
Hysteresis Loops ◽  
Rhombohedral Structure ◽  
Raman Analysis ◽  
Natural Resonance ◽  
State Method ◽  
A Site ◽  
Spiral Spin

Abstract Multiferroic trivalent ions doped BiFeO3 ceramics were synthesized using the rapid liquid state method. The trivalent ions (Sm3+, Gd3+, Y3+) doping causes structural distortion without changing the rhombohedral structure. Raman analysis shows that the effect of doping on E modes is greater than A1 modes, and FeO6 octahedron is regulated by ions doping. M-H hysteresis loops show A-site trivalent ions doped samples exhibit improved magnetism compared with pure BiFeO3 since the suppressed spiral spin structure. Doped samples exhibited natural resonance around 16~17 GHz due to the changes in dielectric loss caused by the tilt of the FeO6 octahedron.

Spiral Spin Structure in the Commensurate Magnetic Phase of Multiferroic RMn2O5

2007 ◽  
Vol 76 (7) ◽  
pp. 074706 ◽  
Author(s):  
Hiroyuki Kimura ◽  
Satoru Kobayashi ◽  
Yoshikazu Fukuda ◽  
Toshihiro Osawa ◽  
Youichi Kamada ◽  
...  
Keyword(s):  
Spin Structure ◽  
Magnetic Phase ◽  
Spiral Spin

Enhancement of ferromagnetism by suppression of spiral spin structure in Ba doped BiFeO3

2019 ◽  
Vol 484 ◽  
pp. 286-290 ◽  
Author(s):  
A.R. Makhdoom ◽  
Syed Mazhar Shah ◽  
Tayyeb Mahmood ◽  
M. Javid Iqbal ◽  
M.J. Akhtar ◽  
...  
Keyword(s):  
Spin Structure ◽  
Spiral Spin

Waves Generation by Spiral Magnets at Phase Transitions

2016 ◽  
Vol 845 ◽  
pp. 185-188
Author(s):  
Igor V. Bychkov ◽  
Dmitry A. Kuzmin ◽  
Alexander P. Kamantsev ◽  
Victor V. Koledov ◽  
Vladimir G. Shavrov
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Acoustic Waves ◽  
Spin Structure ◽  
Phase Transition Kinetics ◽  
Spiral Spin

The possibility of electromagnetic and acoustic waves generation by magnets with spiral spin structure at phase transition to collinear state has been shown. Intensities and frequencies of generated waves have been calculated. It has been shown that intensities of both electromagnetic and acoustic waves strictly depend on the phase transition kinetics.

scholarly journals Structural, magnetic behaviors and temperature-dependent Raman scattering spectra of Y and Zr codoped BiFeO3 ceramics

2015 ◽  
Vol 05 (03) ◽  
pp. 1550025 ◽  
Author(s):  
Cheng Zhang ◽  
Dan Xie ◽  
Jianlong Xu ◽  
Yilin Sun ◽  
Yongyuan Zang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spin Structure ◽  
X Ray Diffraction ◽  
Phonon Modes ◽  
Temperature Dependent ◽  
X Ray ◽  
Raman Modes ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
Spiral Spin

Multiferroic [Formula: see text] (BFO) and Y, Zr codoped BFO [Formula: see text] ceramics were prepared and the influence of codoping on the crystal structure and magnetic properties were investigated in this work. Confirmed by the evolution of X-ray diffraction and Raman modes, the codoping has changed the crystal structure from rhombohedral to tetragonal in bulk BFO ceramics. The enhancement of magnetic behaviors is demonstrated by the damage of space-modulated spiral spin structure, and it can be attributed to the crystal structure change and size effects. Meanwhile, Raman spectra from 300 to 800 K demonstrates that lower frequency phonon modes show rapid softening near the Neel temperature.

Magnetoelectric properties of Co-doped BiFeO3 nanoparticles

2018 ◽  
Vol 32 (12) ◽  
pp. 1850143 ◽  
Author(s):  
V. G. Shrimali ◽  
K. N. Rathod ◽  
Davit Dhruv ◽  
Alpa Zankat ◽  
Khushal Sagapariya ◽  
...  
Keyword(s):  
Spin Structure ◽  
Room Temperature ◽  
Sol Gel ◽  
Equivalent Circuit Model ◽  
Frequency Range ◽  
X Ray Diffraction ◽  
X Ray ◽  
Universal Power Law ◽  
Coupling Parameters ◽  
Spiral Spin

The magnetoelectric (ME) properties of sol–gel grown BiFe[Formula: see text]Co[Formula: see text]O3 (BFCO) nanoceramics, with different sizes, were investigated at room-temperature. X-ray diffraction (XRD) measurement was performed to investigate structural properties of the samples understudy. Magnetic field-dependent dielectric permittivity has been systematically investigated in the frequency range of 20 Hz to 1 MHz. To ensure the origin of magnetodielectric response, the magnetoimpedance (MI) spectroscopy was adopted using equivalent circuit model. The a.c. conductivity was found to obey the Jonscher’s universal power law. The modifications in spiral spin structure in the BFCO nanoparticles with size less than [Formula: see text]62 nm significantly affect the ME coupling parameters.

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