Pressure variation of the magnetic state in Co–Fe–Cr stainless Invar alloy

Disappearance of ferromagnetism in amorphous La(Fe0.85Al0.15)13 under high pressure

“…These pressure variations of the χ -T curves are similar to those in Fe-Ni Invar alloy which have almost the same Fe-Fe distance [5]. In addition, some similar type pressure variations of the χ -T curves were observed in several other Invar alloys by our group [5][6][7][8]. Considering from these facts, there is possibility that the existence of a high-pressure magnetic state is one of a common feature of the magneto-volume instability alloys.…”

“…A new high-pressure magnetic state came to appear above 3.5 GPa from the low-temperature side, and it remains at the pressure that the ferromagnetic state disappeared. These pressure variations are similar to some other Invar alloys, previously studied [5][6][7][8]. The pressure variation of amorphous La(Fe 0.85 Al 0.15 ) 13 is quiet different from the crystalline state of La(Fe 0.85 Al 0.15 ) 13 [20].…”

“…ac susceptibility measurements under high pressure were performed by using a cubic anvil type high-pressure apparatus [5][6][7][8]. ac susceptibility signals were measured by induction method.…”

“…Recently, several high-pressure magnetic states were discovered in ferromagnetic alloys that show marked magneto-volume instabilities, such as Fe-Ni, Fe-Pt Invar alloys and so on [1][2][3][4][5][6][7][8].…”

Pressure dependence of temperature variation of AC susceptibility for Fe50Ni37Mn13 and comparison to Fe68.1Ni31.9

“…Some experimental studies have reported that a pressureinduced magnetic phase transition occurs in Invar alloys at low temperatures and that the ferromagnetic (FM) state collapses at high pressures [3][4][5][6][7][8][9][10]. Previously, our group performed the alternative current (AC) susceptibility measurement of Invar alloys at pressures as high as 7.5 GPa in the temperature range above 5 K. In ordered and disordered Fe-Pt Invar alloys, FM states collapse and high-pressure magnetic states, which differ between ordered and disordered alloys, begin to appear as the pressure increases [7,8].…”