Pressure-Induced Invar Behavior in Pd_3Fe
Abstract
Synchrotron x-ray diffraction (XRD) measurements, nuclear forward scattering (NFS) measurements, and density functional theory (DFT) calculations were performed on L1_2-ordered Pd_3Fe. Measurements were performed at 300 K at pressures up to 33 GPa, and at 7 GPa at temperatures up to 650 K. The NFS revealed a collapse of the ^(57)Fe magnetic moment between 8.9 and 12.3 GPa at 300 K, coinciding with a transition in bulk modulus found by XRD. Heating the sample under a pressure of 7 GPa showed negligible thermal expansion from 300 to 523 K, demonstrating Invar behavior. Zero-temperature DFT calculations identified a ferromagnetic ground state and showed several antiferromagnetic states had comparable energies at pressures above 20 GPa.
Additional Information
© 2009 The American Physical Society. Received 24 February 2008; published 10 June 2009. We thank Y. Xiao and P. Chow for assistance with the NFS measurements, J. McCorquodale and M. Kresch for computational support, and to O. Delaire for helpful discussions. This work was supported by the Carnegie-DOE Alliance Center (CDAC), funded by the U.S. Department of Energy (DOE) through the Stewardship Sciences Academic Alliance (SSAA) of the National Nuclear Security Administration (NNSA). Use of the APS, ANL, was supported by DOE, Office of Science, Office of Basic Energy Sciences (BES), under Contract No. DE-AC02-06CH11357. HPCAT (Sector 16) was supported by DOE-BES, DOE-NNSA, the National Science Foundation (NSF), and the W. M. Keck Foundation. Use of the NSLS, BNL, was supported by DOE-BES, under Contract No. DE-AC02-98CH10886. Beam line X17C at NSLS was supported by the Consortium for Materials Properties Research in Earth Sciences (COMPRES) of NSF.Attached Files
Published - Winterrose2009p4737Phys_Rev_Lett.pdf
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Additional details
- Eprint ID
- 15508
- Resolver ID
- CaltechAUTHORS:20090901-084412556
- Carnegie-DOE Alliance Center
- DE-AC02-06CH11357
- Department of Energy (DOE)
- Department of Energy (DOE) National Nuclear Security Administration
- NSF
- W. M. Keck Foundation
- DE-AC02-98CH10886
- Department of Energy (DOE)
- Created
-
2009-09-10Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field