Phase transitions in ferromagnets with dipolar interactions and uniaxial anisotropy

1995 ◽  
Vol 51 (21) ◽  
pp. 15229-15249 ◽  
Author(s):  
K. Ried ◽  
Y. Millev ◽  
M. Fähnle ◽  
H. Kronmüller
Keyword(s):  
Phase Transitions ◽  
Uniaxial Anisotropy ◽  
Dipolar Interactions

Magnetic phase transitions, anisotropic susceptibility and dipolar interactions in antiferromagnetic MnNb2O6

1976 ◽  
Vol 1 (4) ◽  
pp. 320-325 ◽  
Author(s):  
O.V. Nielsen ◽  
T. Johansson ◽  
L.M. Holmes ◽  
G.J. Cock ◽  
L.W. Roeland ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Dipolar Interactions

scholarly journals Магнитные фазы и неоднородные микромагнитные структуры в феррит-гранатовой пленке с ориентацией (210)

2018 ◽  
Vol 60 (5) ◽  
pp. 923
Author(s):  
Р.М. Вахитов ◽  
Р.Р. Исхакова ◽  
А.Р. Юмагузин
Keyword(s):  
Phase Diagram ◽  
Phase Transitions ◽  
Uniaxial Anisotropy ◽  
Magnetization Vector ◽  
Magnetic Phases ◽  
Common Structure ◽  
Magnetic Inhomogeneities ◽  
Domain Boundaries ◽  
Magnetic States

AbstractPossible magnetic states of a cubic ferromagnet with a uniaxial anisotropy induced along the [210] direction are theoretically investigated. It is demonstrated that the orientation phase diagram of a magnet is nontrivial and admits the existence of three types of magnetic phases that differ in transformational properties and the presence of quintuple points, isostructural phase transitions, etc. It is found that magnetic inhomogeneities, regardless of the values of parameters of the matter, have a common structure: they correspond to 180-degree domain boundaries with a noncircular trajectory of the magnetization vector. The features of homogeneous and inhomogeneous magnetic states, found in these materials, make it possible to explain the manifestation of a flexomagnetoelectric effect in them.

D-STRAIN, g-STRAIN, AND DIPOLAR INTERACTIONS IN THE Fe8 AND Mn12 SINGLE MOLECULE MAGNETS: AN EPR LINESHAPE ANALYSIS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3326-3329 ◽  
Author(s):  
S. HILL ◽  
S. MACCAGNANO ◽  
R. ACHEY ◽  
N. DALAL ◽  
K. PARK
Keyword(s):  
Single Molecule ◽  
High Field ◽  
Anisotropy Parameter ◽  
Uniaxial Anisotropy ◽  
High Sensitivity ◽  
Dipolar Interactions ◽  
Single Molecule Magnets ◽  
Field Frequency ◽  
Lineshape Analysis ◽  
Oriented Single Crystal

We report high sensitivity, high field/frequency (up to 9 tesla/210 GHz) EPR measurements on the Fe8 and Mn12 single molecule magnets. Oriented single crystal studies, carried out in well defined experimental geometries, enable very accurate determinations of EPR lineshapes; we note that this is not possible when studying aligned powders or polycrystals. Analysis of individual resonances, which we can assign to known transitions, reveal complex nonlinearities in the linewidths as functions of energy eigenstate, frequency, and temperature. Our findings compare favorably with recent calculations which introduce distributions in the uniaxial anisotropy parameter D, the Landé g-factor, and dipolar interactions.

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