Coexistence of charge-density wave and ferromagnetism in Ni2MnGa

TitleCoexistence of charge-density wave and ferromagnetism in Ni2MnGa
Publication TypeJournal Article
Year of Publication2012
AuthorsD'Souza SW, Rai A, Nayak J, Maniraj M, Dhaka RS, Barman SR, Schlagel DL, Lograsso TA, Chakrabarti A
Journal TitlePhysical Review B
Volume85
Pages085123
Date Published02
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000300661500001
Keywordsalloy ni2mnga, crystal-structure, LOW-TEMPERATURE, magnetic order, MARTENSITE, memory compound ni2mnga, peierls, phase-transitions, photoemission, premartensitic transformation, transition
Abstract

We demonstrate the existence of a charge-density-wave (CDW) associated with an incommensurate periodic lattice distortion on Ni2MnGa surface in the ferromagnetic state. Our temperature-dependent photoemission spectra provide compelling evidence of a pseudogap at the Fermi level for T-CDW <= 270 K that appears at the onset of the premartensite phase and persists in the martensite phase. While the width of the pseudogap is about 25 meV, a spectral weight transfer is observed over a much wider energy range that is associated with the CDW.

URL<Go to ISI>://WOS:000300661500001
DOI10.1103/PhysRevB.85.085123
Alternate JournalPhys. Rev. B