Giant magnetothermal conductivity in the Ni-Mn-In ferromagnetic shape memory alloys

B. Zhang*, X. X. Zhang, S. Y. Yu, J. L. Chen, Z. X. Cao, G. H. Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

In this letter the authors present the observation of giant magnetothermal conductivity in NiMnIn single crystals. Upon cooling, a martensitic transformation is accompanied by a ferromagnetic metal→ferrimagnetic poor-metal transition. Most strikingly, this transition can be shifted to lower temperature and even totally suppressed by a magnetic field. The magnetic field-induced phase transition leads to a large magnetoresistance and a large magnetothermal conductivity up to 70% and 120%, respectively. The specific heat measurements indicate that the large magnetotransport properties are due to the increasing the density of free electrons, suggesting existence of superzone gap in the low-temperature, ferrimagnetic martensite.

Original languageEnglish (US)
Article number012510
JournalApplied Physics Letters
Volume91
Issue number1
DOIs
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Giant magnetothermal conductivity in the Ni-Mn-In ferromagnetic shape memory alloys'. Together they form a unique fingerprint.

Cite this