Magnetic transitions in Mn3Ga1−Al C (0⩽ x⩽ 0.1)

X-ray Powder Diffraction Studies of Mn<SUB>3</SUB>Ga<SUB>0.97</SUB>Al<SUB>0.03</SUB>C in Magnetic Fields

“…3-6) The previous reports 4,6) and the our results show that this firstorder phase transition becomes dully with increasing x. Figure 3 shows the typical X-ray powder diffraction profiles of Mn 3 Ga 0:97 Al 0:03 C in 81:5 2 83:5 at several temperatures in a zero magnetic field.…”

“…This negative volume magnetostriction is consistent with the previous reports for Mn 3 Ga 1Àx Al x C with x ¼ 0, 0.03, and 0.05. 1,2,4,6) With further decreasing temperature, the shrinkage of a becomes less steep below T I{F . For T < 80 K, the lattice parameter a of the major AF phase is only shown in Fig.…”

“…The transition temperatures vary with depending on the Al content. [4][5][6] On the other hand, recently, it has been found that Mn 3 GaC shows a large magnetocaloric effect of approximately 15 Jkg À1 K À1 in a magnetic field change of 1-2 T, accompanied by the first-order magnetic phase transition. [7][8][9] Therefore, the compound also has been attracted interest from the point of view of application as a magnetic refrigeration material.…”

Magnetic properties and room-temperature magnetocaloric effect in the doped antipervoskite compounds Ga1−xAlxCMn3 (0≤x≤0.15)

“…However, rare report has been focused on the MCE of the second-order FM-PM transition in GaCMn 3 . According to the previous investigations, the physical properties of GaCMn 3 could be effectively manipulated by the magnetic field, pressure, and chemical doping [19][20][21][22][23]. The A site-doping effect (A ¼Al, Zn, Sn, etc.)…”

“…The A site-doping effect (A ¼Al, Zn, Sn, etc.) on the magnetic transitions of GaCMn 3 has also been studied in [19]. However, the MCEs of these related compounds are still unknown to date.…”