Abstract
Measurements of the temperature dependence of the magnetic susceptibility of Sr14MnAs11 were made from ambient pressure to P≤20 kbars. At ambient pressure this compound is known to be a semiconductor with a Curie susceptibility down to as low as 5 K. It is found that raising the pressure to 7 kbars enhances the susceptibility somewhat and that at pressures above 10-11 kbars the susceptibility is enhanced by more than an order of magnitude and an ordered magnetic state occurs with a transition temperature that increases as the pressure is increased. This suggests that the applied pressure leads to a band-crossing transition from semiconductor to metal and a consequent exchange coupling of the Mn spins.
Original language | English (US) |
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Pages (from-to) | 4849-4852 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 47 |
Issue number | 9 |
DOIs | |
State | Published - 1993 |
ASJC Scopus subject areas
- Condensed Matter Physics