Thermophysical properties of intermetallic Mn3MC perovskites I. Heat capacity of manganese gallium carbide Mn3GaC

Effects of carbon deficiency on the magnetic interactions in GaCMn3, a critical behavior study

“…The fitted value of γ e is equal to 39.6 mJ/mol K 2 . This γ e value is remarkably larger than that for GaCMn 3 , i.e., 21.1 mJ/mol K 2 [3] or 19 mJ/mol K 2 reported by Garcia et al [37]. The enhanced γ e in the carbon deficient compound probably indicates an enhancement of DOS at E F , which supports the above discussion that the carbon deficiency causes the reduced Mn 3d-C 2p hybridization near the Fermi surface and accordingly the 3DH-like critical behavior below T C .…”

Large magnetocaloric effect of Mn3−Co GaC

“…2. Below T t ; the antiferromagnetic state with low entropy is replaced by the ferromagnetic state with high entropy by applying a magnetic field, which leads to a positive magnetic entropy change.The peak value of DS mag reaches 15 J/kg K in an applied field of 1 T, which is in agreement with the entropy jump in zero field estimated from the specific heat curve [5]. This large magnetic entropy change originates from a large value of dM=dT at T t ; as expressed in Eq.…”

“…The peak value of DS mag reaches 15 J/kg K in an applied field of 1 T, which is in agreement with the entropy jump in zero field estimated from the specific heat curve [5]. This large magnetic entropy change originates from a large value of dM=dT at T t ; as expressed in Eq.…”

Negative magnetocaloric effect at the antiferromagnetic to ferromagnetic transition of Mn3GaC

“…In the present study, we have chosen Mn 3 GaC. This compound undergoes an antiferromagnetic to ferromagnetic transition around the temperature of T t ϭ160 K. 7 In previous studies, the entropy jump at the antiferromagnetic to ferromagnetic transition in zero field was reported to be 17 J/kg K. 8,9 On the other hand, the field dependence of T t has been found to be large, being dT t /dH ϭ4 K/T. 10 The former suggests that a large magnetic entropy change will be obtained when a magnetic field is applied on this compound.…”