Multifunctional behavior of Fe-doped MnNiGe magnetic equiatomic compound

Hydrostatic pressure tuned magneto-structural transition and occurrence of pressure induced exchange bias effect in Mn0.85Fe0.15NiGe alloy

“…and their derivatives have attracted renewed attentions for the observation of fascinating magneto-functional and physical properties such as, large magneticaloric effect (MCE), exchange bias effect (EBE), spin glass (SG) like ground state etc. [1][2][3][4][5][6][7][8][9][10][11][12] Among various members of MEAs, MnNiGe is one of the potential candidates which undergoes a first-order diffusionless structural phase transition, known as martensitic phase transition (MPT), at 470 K during cooling and orders spiral antiferromagnetically below 346 K. 1,3,4,8 Physical and chemical pressures are the two most influencing parameters that can affect the physical properties of these materials simply by modifying structural parameters like lattice volume, bond angle etc. 8,13,14 Among these two, chemical pressure approach (different doping studies) is much popular among the researchers due to easy sample preparation and measurement options.…”

Martensitic transition assisted modification of the antiferromagnetic ordering in Ge-site doped MnNiGe alloys

“…As is evident from previous studies, transition temperatures in MnNiGe are highly sensitive to the compositional elements and their molar percentage [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Partial substitution of different sites of the parent compound with a suitable foreign element corresponds to a significant change in both structural and magnetic transition temperatures [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Interestingly, the alloy retains the AFM ordering after doping at the Mn/Ni site, as confirmed by the magnetic and neutron powder diffraction (NPD) analysis [9,10,[15][16][17][18][19][24][25][26][27][28].…”

“…Partial substitution of different sites of the parent compound with a suitable foreign element corresponds to a significant change in both structural and magnetic transition temperatures [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Interestingly, the alloy retains the AFM ordering after doping at the Mn/Ni site, as confirmed by the magnetic and neutron powder diffraction (NPD) analysis [9,10,[15][16][17][18][19][24][25][26][27][28]. On the other hand, the effect of doping at the Ge site is slightly different than Mn/Nisite doping.…”

“…Among the various members of the magnetic equiatomic family (general formula MM X , where M and M are transition metals and X is a nonmagnetic sp element), MnNiGe is widely accepted as a promising candidate for practical applications as it possess multiple functional properties, including the shape memory effect, a large magnetocaloric effect, magnetoresistance, the exchange bias effect, etc. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In addition, the undoped MnNiGe alloy undergoes multiple phase transformations (structural and magnetic depending on the thermal state of the material), namely, (i) MPT around 470 K from the high-temperature Ni 2 In-type hexagonal austenite phase (space group P6 3 /mmc) to the TiNiSi-type orthorhombic martensite phase (space group Pnma) and (ii) a paramagnetic (PM) to spiral antiferromagnetic (AFM) transition below or around 346 K [8][9][10]16,[24][25][26][27][28].…”

Investigating the normal state and superconducting state properties of orthorhombic and hexagonal ZrRuP: A first-principles study

“…Equiatomic intermetallic T T X compounds (T : electronpoor transition metal, T : electron-rich transition metal, X : P, As, and Si) have been widely investigated in the least 50 years with respect to their interesting structural [1][2][3][4][5][6][7][8][9][10][11][12][13] and magnetic [14][15][16][17][18][19][20][21][22][23][24][25][26] properties. Related to the size and the electron count of the transition metal, these compounds either exist in the orthorhombic TiNiSi-type structure [1] or the hexagonal ZrNiAl-type structure [3].…”