FE-57 AND SN-119 MOSSBAUER STUDIES ON LA1.25ND0.6SR0.15CUO4 - EVIDENCE FOR LOCAL MAGNETIC-ORDERING BELOW SIMILAR-OR-EQUAL-TO-32-K

被引：17

作者：

BREUER, M

BUCHNER, B

MICKLITZ, H

BAGGIOSAITOVITCH, E

AZEVEDO, IS

SCORZELLI, R

ABDELMEGUID, MM

机构：

[1] CTR BRASILIERO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL

[2] RUHR UNIV, D-44780 BOCHUM, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1993年 / 92卷 / 03期

关键词：

D O I：

10.1007/BF01308750

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Fe-57- and Sn-119 Mossbauer effect studies on 0.5 at % Fe-57 (or Sn-119) doped non-superconducting La1.25Nd0.6Sr0.15CuO4 in the temperature region 300 K greater-than-or-equal-to T greater-than-or-equal-to 4.2 K reveal an onset of local magnetic ordering occurring at T(M) congruent-to 32 K for both Fe-57 - as well as Sn-119-doped samples. The local magnetic ordering shows up in the presence of a very large transferred hyperfine field of B(thf) congruent-to 11.0(5) T at the Sn-119 nuclei. Since such a large field is neither present in antiferromagnetic La2CuO4, nor in superconducting La1.85Sr0.15CuO4 or overdoped La2-xSrxCuO4 (x=0.4), the occurrence of such local spin correlations seems to be a signature of the non-superconducting low temperature tetragonal phase of La1.25Nd0.6Sr0.15CuO4.

引用

页码：331 / 334

页数：4

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