Effect of Zn- or Ni-substitution on specific heat in La1.875Ba0.125CuO4: role of spin interaction in stripe phase

Autor:	Yoshitoshi Okajima, Kazuhiko Yamaya, Satoshi Tanda, O Anegawa
Rok vydání:	2000
Předmět:	Materials science Specific heat Condensed matter physics Phase (matter) Substitution (logic) Doping Crystallite Electrical and Electronic Engineering Condensed Matter Physics Spin (physics) Phase formation Electronic Optical and Magnetic Materials
Zdroj:	Physica B: Condensed Matter. :918-919
ISSN:	0921-4526
DOI:	10.1016/s0921-4526(99)01061-3
Popis:	We investigated the effect of Zn- or Ni-substitution on specific heat in La1.875Ba0.125CuO4 where the electronic specific heat coefficient, γ, is largely suppressed by the stripe phase formation. The measurements of specific heat were carried out between 1.5 and 7 K for the polycrystalline samples of La 1.875 Ba 0.125 Cu 1−y M y O 4 ( M=Zn or Ni ). From the y dependence of γ in the Zn-doping case the stripe phase is found to be fully destroyed by doping. While the result of the Ni-doping case shows that the stripe phase is not totally broken, but may undergo a new phase. The difference between Zn- and Ni-doping cases indicates that the spin interaction plays an important role for the stripe phase formation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7450aa2f55b451f85444ba57557911f0 https://doi.org/10.1016/s0921-4526(99)01061-3 Zobrazit plný text záznamu Full Text from ScienceDirect