Magnetic anisotropy induced by high energy ball milling of Fe2MnAl

Abstract

The effect of disorder and magnetic properties of nanosized Fe2MnAl Heusler alloy has been studied using a combination of x-ray diffraction, F57e Mössbauer spectroscopy, and dc magnetization. X-ray diffraction spectrum of as-milled sample shows texturing in (400) plane. Mössbauer and dc magnetization studies of milled sample show direction dependent magnetic properties. Hysteresis loop at room temperature taken after the field cooling shows a horizontal shift evidencing the presence of exchange bias. This is attributed to core-shell ferromagnetic-antiferromagnetic coupling within nanoparticles of the same material.

Pressure-induced magnetic moment abnormal increase in Mn2FeAl and non-continuing decrease in Fe2MnAl via first principles

“…The calculated volume-energy relationship determines the ferromagnetic (FM) states as the ground states of the Fe 2 MnAl and Mn 2 FeAl. The calculated equilibrium lattice constants are 5.673 and 5.781 Å for Fe 2 MnAl and Mn 2 FeAl, respectively, in good agreement with previous results 5.64 9 , 5.683 10 , 5.67 11 , 5.85 12 , 5.816 13 and 5.76 10 , 5.725 14 , 5.74 15 , respectively. All of the bonds in Mn 2 FeAl are longer than their counterparts in Fe 2 MnAl, such as the lengths of Mn(A)-Fe and Mn(B)-Fe are longer than those of Fe-Fe and Mn-Fe, respectively.…”

Structural and magnetic properties of Co2CrAl Heusler alloys prepared by mechanical alloying

“…Recently Hatchard et al [10] have explored MA technique for processing of Ni-Mn-Ga Heusler alloys. Vinesh et al [11] investigated the effect of ball milling on magnetic properties of Fe 2 MnAl Heusler alloys. Also Mikami et al [13] have used MA for the preparation of Fe 2 VAl Heusler alloys.…”

“…Umetsu et al [7] have studied the magnetic properties of Co 2 MnAl alloy obtained by induction melting under an argon atmosphere. The mechanical alloying (MA) route has been recognized as a powerful method for the production of novel, high-performance and low-cost materials such as ferrites, manganites, intermetalics and Heusler alloys [8][9][10][11][12][13]. The MA synthesis can deliver the designed phases and structures by a single step of the high-energy milling, conducted in an enclosed activation chamber at room temperature.…”

Evolution of microstructural and mechanical properties of nanocrystalline Co2FeAl Heusler alloy prepared by mechanical alloying

“…Recently, Hatchard et al [22] have explored an MA technique for processing Ni-Mn-Ga Heusler alloys. Vinesh et al [23] investigated the effect of ball milling on magnetic properties of Fe 2 MnAl Heusler alloys. Mikami et al [25] have also used MA for the preparation of Fe 2 VAl Heusler alloys.…”