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(a) A schematic diagram showing the impedance measurements using a coaxial line method on a toroidal sample under axial compressive stresses. (b) Measured (symbols) and fitted (solid lines) μ′ and μ″ spectra for CoFe2O4 without any applied stress. The dotted and dotted-dashed lines represent the susceptibilities due to domain wall motion ( and ) and magnetization rotation ( and ).
Dependence of the static susceptibilities of domain wall motion ( ), magnetization rotation ( ), and their sum ( ) on the Mn content x.
The measured (symbols) and fitted (solid lines) μ′ and μ″ spectra for (a) CoFe2O4 and (b) CoMn0.3Fe1.7O4 under axial applied stresses of 0 MPa and −106 MPa.
Plot of (a) , (b) , and (c) versus axial applied stress τ A for all samples. The dotted lines in (b) and (c) are modeled susceptibilities using Eqs. (5) and (6) , respectively. (d) A schematic diagram showing the orientation of domain magnetization Ms relative to the stress axis, easy axis, and field H.
Measured values of MS , K 1, maximum λ, and the calculated ratios MS /K 1 (normalized) and . Also shown are the model parameters c and b determined from the experimental B-H loops and λ-M curves, respectively. The parameter was calculated using the measured values of shown in Fig. 2 .
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