Anomalous magnetoresistance behavior of an insulating zirconium oxynitride CernoxTM thermometer

R. Rosenbaum*, B. Brandt, S. Hannahs, T. Murphy, E. Palm, B. J. Pullum

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Zirconium oxynitride insulating films make excellent thermometry at 4 K and above. The resistance is almost independent of magnetic fields up to 30 T and exhibits good temperature sensitivity and good reproducibility upon temperature cycling. However below 4 K, this material exhibits an anomalous negative magnetoresistance (MR); for example at 86 mK, the resistance decreases by a factor of 24 in a 17 T field as compared to its zero-field value. The negative magnetoresistnce behavior is explained using a model proposed by Movaghar, Schweitzer and Osaka. Fits to the negative MR data are good above 0.3 K but become poorer at lower temperatures.

Original languageEnglish
Pages (from-to)489-491
Number of pages3
JournalPhysica B: Condensed Matter
Volume294-295
DOIs
StatePublished - Jan 2001

Funding

FundersFunder number
State of Florida
National Science FoundationDMR- 9527035
Tel Aviv University

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