Mössbauer study of the spin reorientation in pseudobinary alloy Hf0.82Ta0.18Fe2

Mechanical properties and structure of rapidly solidified bulk Fe89−xHf4Ta1Cu1Gd1SixB4 (x=0–15) and Fe74Hf4Ta1Cu1Gd1LaySi15−yB4 (y=7) alloys

“…It was found that, besides bcc-Fe and borides identified in all samples except Ref, h-Fe 2 Hf 0.8 Ta 0.2 was present in the alloys with x = 0-15 as well as y = 7 and fcc-Fe 16 Hf 6 Si 7 phase was identified in the alloys with x = 8-15. The Fe 2 Hf 1−z Ta z pseudobinary system is more stable as hexagonal C14 MgZn 2 -type than cubic C15 MgCu 2 -type Laves structure [33] and tend to crystallize in C14 structure in the whole compositional range, i.e., for z = 0-1 [34][35][36].…”

“…Well known for its itinerant-electron magnetic properties [34,35,37] especially for z = 0.2, C14 Laves phases are expected to be brittle, exhibit the Young modulus of about 30-50 GPa and Poisson's ratio of 0.235-0.242 [38]. There is only a limited information in the literature regarding the fcc-Fe 16 Hf 6 Si 7 D8 a -type phase isostructural with Mg 16 Cu 6 Si 7 [39].…”

Cross over between ferro and antiferromagnetic order in Fe itinerant electron magnetism: An experimental and theoretical study of the model (Hf,Ta)Fe 2 Laves phases

“…Indeed TaFe 2 is a antiferromagnet with a low Néel temperature, T N = 30 K whereas the HfFe 2 presents, on the contrary, a ferromagnetic order up to Curie temperature as high as 600 K. A complete solid solution is possible upon substitution of Ta for Hf, thus enabling to explore continuously the physical properties of this pseudobinary system at the verge of the ferromagnetic to antiferromagnetic order. Several studies have been carried out on the basis of this system including magnetization measurements [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], magnetocaloric one [11,14,20], transport properties investigation [12,13,18].…”

“…Hf 1Àx Ta x Fe 2 compounds have attracted much attention due to their interesting magnetic properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], magnetocaloric properties [11,14,20] and their potential applications in giant magnetoresistance [12,13] and magnetostrictive transducers [19]. From their pioneering works, Nishihara and Yamaguchi have established the magnetic phase diagram of the Hf 1Àx Ta x Fe 2 system by means of magnetization and Mössbauer spectroscopy experiments [1][2][3][4].…”

Itinerant-electron metamagnetism of the Hf1−xTaxFe2 (x=0.125 and 0.14) compounds under high pressure

“…Hf 1 À x Ta x Fe 2 Laves phase compounds are known as itinerantelectron magnets and have attracted much attention due to their interesting magnetic properties [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], magnetocaloric properties [17,20,25,26], electronic properties [27][28][29] and their potential applications in giant magnetoresistance [18,19] and magnetostrictive transducers [30]. The pseudobinary system Hf 1 À x Ta x Fe 2 crystallizes in the hexagonal MgZn 2 -type structure (space group P6 3 /mmc) in which the Fe atoms are located on two inequivalent crystal sites (2a and 6h) with the Hf/Ta atoms occupying the 4f site.…”