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Satterthwaite, C.B. Ellis, Thomas Edward 2011-06-30T16:59:24Z 2014-04-18T15:07:57Z 1978 Three studies of the low temperature anomaly in Pd-H and Pd-D have been undertaken. In the first, a study of the electrical resistance anomaly has been made to determine the effects of varying hydrogen concentration. The temperature of the resistive peak was seen to increase with H(D)/Pd for ratios above .63. In the second experiment samples of Pd-H and Pd-D with high (T > 70 K) anomaly temperatures have been held below T for extended time a a periods. Resistance was seen to fall by up to 60% after several days of annealing. Reductions in annealing temperature caused further reductions in resistance. The changes are reversible; heating the samples to 90 K or more restored the original resistance. The third experiment was a neutron diffraction experiment on a single crystal of PdD.76. Annealing the crystal at 70 K produced superlattice diffraction lines belonging to the star {4/5 2/5 0}. The growth of the new lines with time bears a striking relationship to the resistance behavior. The peaks were erased by heating to 90 K, and reappeared at the same locations when the crystal was again annealed at 70 K. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T16:59:24Z No. of bitstreams: 1 1978_ellis.pdf: 2917388 bytes, checksum: 5a49800b195b23ec2d5c4c64070822c8 (MD5) Made available in DSpace on 2011-06-30T16:59:24Z (GMT). No. of bitstreams: 1 1978_ellis.pdf: 2917388 bytes, checksum: 5a49800b195b23ec2d5c4c64070822c8 (MD5) Previous issue date: 1978 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T16:59:24Z Item is restricted indefinitely. Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-04-18T15:07:57Z Item was in collections: Graduate Theses and Dissertations at Illinois (ID: 204) Dissertations and Theses - Physics (ID: 445) No. of bitstreams: 1 1978_ellis.pdf: 2917388 bytes, checksum: 5a49800b195b23ec2d5c4c64070822c8 (MD5) Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-04-18T15:07:57Z 356082 http://hdl.handle.net/2142/25603 en University of Illinois at Urbana-Champaign Copyright 1978 Thomas Edward Ellis low temperature anomally palladium hydride electrical resistance anomally Studies of the low temperature anomaly in palladium hydride Dissertation / Thesis text Physics Physics Dissertation Ph.D.