IMPURITY EFFECT ON THE STABILITY OF THE GROUND-STATE SPIN CONFIGURATION IN TRIANGULAR LATTICE ANTIFERROMAGNET CUFEO2

被引：32

作者：

AJIRO, Y ^{[1
]}

HANASAKI, K ^{[1
]}

ASANO, T ^{[1
]}

TAKAGI, T ^{[1
]}

MEKATA, M ^{[1
]}

ARUGAKATORI, H ^{[1
]}

GOTO, T ^{[1
]}

机构：

[1] UNIV TOKYO, INST SOLID STATE PHYS, TOKYO 106, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 10期

关键词：

FIELD-INDUCED TRANSITION; FRUSTRATED ANTIFERROMAGNET; IMPURITY EFFECT; CUFEO2;

D O I：

10.1143/JPSJ.64.3643

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effect of impurities on the high-field magnetization process in a frustrated antiferromagnet CuFeO2 is studied for powder samples of CuFe1-xAlxO2 (0 less than or equal to x less than or equal to 0.1) and CuFe1-xCrxO2 (0 less than or equal to x less than or equal to 0.08) using a pulse magnet up to 38 T. For the pure Fe compound distinct magnetization anomalies are successively observed at 7, 12 and 20 T due to the field-induced transitions originated from a subtle balance of competing interactions. These anomalies rapidly disappear with increasing impurity concentration. The effect of impurities is interpreted in terms of the magnetic domain model in which the collinear spin structure of the pure system survives locally as domains without coherence as a consequence of partial suppression of a geometrical frustration by impurities.

引用

页码：3643 / 3646

页数：4

共 6 条

[1]

AJIRO Y, 1994, PHYSICA B, V201, P74

[2]

KASAHARA N, 1995, 50TH M PHYS SOC JAP, P108

[3] MONTE-CARLO STUDIES OF RANDOM IMPURITY EFFECTS IN AN ANTIFERROMAGNETIC ISING-MODEL ON THE TRIANGULAR LATTICE [J].