1998
DOI: 10.1103/physrevb.58.11127
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Magnetic properties of the premartensitic transition inNi2MnGaalloys

Abstract: Magnetization as a function of field and temperature for a ferromagnetic Heusler alloy Ni 2 MnGa is reported. Magnetization above the Martensitic transition displays a field-dependent peak effect, a direct magnetic evidence of premartensitic phase. At low fields, the peak effect occurs at a temperature consistent with the observations of the micromodulated structure transition seen from neutron scattering, electron microscopy, and ultrasonic studies in this compound. At high fields, the peak effect is suppress… Show more

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Cited by 81 publications
(62 citation statements)
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“…Should an increase in the frequencies of the soft phonons exist, it would be consistent with macroscopic measurements that report a decrease of the intermediate transition temperature with increasing magnetic field. 10,23 …”
Section: Resultsmentioning
confidence: 99%
“…Should an increase in the frequencies of the soft phonons exist, it would be consistent with macroscopic measurements that report a decrease of the intermediate transition temperature with increasing magnetic field. 10,23 …”
Section: Resultsmentioning
confidence: 99%
“…Figure 18a shows a phase diagram of Ni 2+x Mn 1−x Ga alloys built numerically with allowance for Eqn (29). The following values of the parameters in Eqns (12) and (29) (see Refs [14,20,21,23,66,67,80,91,123,223]) were …”
Section: T Vs X Phase Diagram At Tm ≈ Tcmentioning
confidence: 99%
“…The resulting system of nonlinear algebraic equations can be solved only numerically. To do the necessary numerical calculations, the following values of parameters in equation (12) were chosen on the basis of the existing experimental data [14,20,21,23,66,67,80,91,123,223] The other parameters were taken from Eqn (30). The experimental data (see Fig.…”
Section: T Vs X Phase Diagram At Tm ≈ Tcmentioning
confidence: 99%
“…For some samples [9, 11,12] there exists evidence for a true phase transition at Tj of very weak first-order which is driven by a magnetoelastic coupling. The main proof of that is the fact that 7/ shifts with the external applied field [9] while no (significant) magnetic field dependence has been found for the TM temperature [13,15]. Moreover, the magnetoelastic effects have been confirmed from the experimentally observed dependence of the elastic constants on an external magnetic field [16].…”
Section: Introductionmentioning
confidence: 59%