scholarly journals Spin reorientation inα-Fe2O3nanoparticles induced by interparticle exchange interactions inα-Fe2O3/NiO nanocomposites

2011 ◽  
Vol 84 (21) ◽  
Author(s):  
C. Frandsen ◽  
K. Lefmann ◽  
B. Lebech ◽  
C. R. H. Bahl ◽  
E. Brok ◽  
...  
Keyword(s):  
Exchange Interactions ◽  
Spin Reorientation

Spin reorientation and exchange interactions in (Nd, R)2Fe14B (R = Y, Gd)

1991 ◽  
Vol 96 (1-3) ◽  
pp. 206-210 ◽  
Author(s):  
Zhang Zhuong-wu ◽  
Zhang Zhi-dong ◽  
X.K. Sun ◽  
Y.C. Chuang ◽  
F.R. de Boer
Keyword(s):  
Exchange Interactions ◽  
Spin Reorientation

Phase Transitions in the Two-Layer Ferrite-Garnet Film

2014 ◽  
Vol 215 ◽  
pp. 246-249 ◽  
Author(s):  
Julia A. Siryuk ◽  
Alexey V. Bezus
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Domain Structure ◽  
Single Layer ◽  
Exchange Interactions ◽  
Spin Reorientation ◽  
Garnet Film ◽  
Ferrite Garnet ◽  
Domain Structures ◽  
Magnetic Compensation

The peculiarities of domain structures (DS) have been investigated in the two-layer film of (YGdTm)3(FeGa)5O12/(YEu)3(FeGa)5O12 composition with a magnetic compensation point (TC) in one of the layers and in the single-layer witnesses-films. It is shown that a change in the ratio of energies of magnetostatic and exchange interactions between the layers under temperature change induces a phase transition (PT) in the domain structure and a spin-reorientation phase transition (SRPT).

A model based on single-ion theory. III. Spin-reorientation and exchange interactions in (Nd, Pr)2Fe14B compounds

1991 ◽  
Vol 127 (2) ◽  
pp. 483-489 ◽  
Author(s):  
Zhi-Dong Zhang ◽  
Zhuong-Wu Zhang ◽  
X. K. Sun ◽  
Y. C. Chuang
Keyword(s):  
Exchange Interactions ◽  
Spin Reorientation ◽  
Model Based

Spontaneous and Field-Induced Magnetic Phase Transitions in Tb1-xRxMn6Sn6 (R = Gd, Y) Compounds

2009 ◽  
Vol 152-153 ◽  
pp. 37-40 ◽  
Author(s):  
N.V. Mushnikov ◽  
P.B. Terent’ev ◽  
V.S. Gaviko ◽  
E.G. Gerasimov ◽  
E.V. Rosenfeld ◽  
...  
Keyword(s):  
Magnetic Phase ◽  
Exchange Interactions ◽  
Spin Reorientation ◽  
Magnetic Phase Transitions ◽  
Critical Fields ◽  
Concentration Dependences ◽  
Temperature Dependences ◽  
Powder Samples ◽  
Spiral Magnetic Structure ◽  
Ferrimagnetic Ordering

Magnetization curves and magnetic susceptibility of Tb1 xRxMn6Sn6 (R = Gd, Y) compounds have been measured for aligned powder samples. Concentration dependences of the spin-reorientation transition temperature and temperature dependences of critical fields of the field-induced magnetic transitions have been determined. For the compound Tb0.1Y0.9Mn6Sn6 with the spiral magnetic structure, we found that application of hydrostatic pressure facilitates the ferrimagnetic ordering. This unusual feature is supported by the observation of a large negative spontaneous volume magnetostriction for TbMn6Sn6. The obtained results are discussed in a model considering three different interlayer Mn-Mn exchange interactions in these compounds.

scholarly journals Spin Structures in Magnetic Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Steen Mørup ◽  
Erik Brok ◽  
Cathrine Frandsen
Keyword(s):  
Low Temperatures ◽  
Particle Surface ◽  
Exchange Interactions ◽  
Short Review ◽  
Spin Reorientation ◽  
Spin States ◽  
Anomalous Temperature ◽  
Spin Structures ◽  
Canted Spin ◽  
Temperature Dependences

Spin structures in nanoparticles of ferrimagnetic materials may deviate locally in a nontrivial way from ideal collinear spin structures. For instance, magnetic frustration due to the reduced numbers of magnetic neighbors at the particle surface or around defects in the interior can lead to spin canting and hence a reduced magnetization. Moreover, relaxation between almost degenerate canted spin states can lead to anomalous temperature dependences of the magnetization at low temperatures. In ensembles of nanoparticles, interparticle exchange interactions can also result in spin reorientation. Here, we give a short review of anomalous spin structures in nanoparticles.

Magnetic Properties of Nd0.6Dy0.4Fe3(Bo3)4

2012 ◽  
Vol 190 ◽  
pp. 261-264 ◽  
Author(s):  
A.A. Demidov ◽  
I.A. Gudim ◽  
E.V. Eremin
Keyword(s):  
Magnetic Properties ◽  
Field Model ◽  
Exchange Interactions ◽  
Field Approximation ◽  
Spin Reorientation ◽  
Spin Reorientation Transition ◽  
Extensive Experimental Data ◽  
The Magnetic Field ◽  
Theory And Experiment ◽  
Good Agreement

The magnetic properties of trigonal Nd0.6Dy0.4Fe3(BO3)4 substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated. It has been shown that in Nd0.6Dy0.4Fe3(BO3)4 a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 31 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B||c. The calculations were performed using a molecular-field approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd0.6Dy0.4Fe3(BO3)4 have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences.

SPIN REORIENTATION PHENOMENA IN SUBSTITUTED Pr2 (Co, Fe)17 INTERMETALLICS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-507-C8-508
Author(s):  
H. Y. Chen ◽  
B. M. Ma ◽  
S. G. Sankar ◽  
W. E. Wallace
Keyword(s):  
Spin Reorientation
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