Interrelation between orbital polarization and magnetic structure in bilayer manganites

被引：29
作者：
Akimoto, T [1 ]
Moritomo, Y
Ohoyama, K
Okamoto, S
Ishihara, S
Maekawa, S
Nakamura, A
机构：
[1] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, CIRSE, Nagoya, Aichi 4648601, Japan
[3] JST, PRESTO, Chiyoda Ku, Tokyo 102, Japan
[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[5] Nagoya Univ, CIRSE, Nagoya, Aichi 4648601, Japan
来源：
PHYSICAL REVIEW B | 1999年 / 59卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.59.R14153
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A-site substitution effects on the magnetic and lattice structure have been investigated for bilayer manganites, (La1-zNdz)(1.2)(Sr1-yCay)(1.8)Mn2O7, without changing the e(g)-electron concentration (x = 0.4). The ferromagnetic metallic (FM) phase of the parent La1.2Sr1.8Mn2O7 (T-C= 120 K) is suppressed by Nd doping (z), and a paramagnetic insulating (PI) state appears above z = 0.3. The FM phase is suppressed also by Ca doping (y), but a layered-type antiferromagnetic (A-AF) structure appears above y = 0.3. We have investigated the stability of the d(x2-y2) (or d(3Z2-r2)) orbital by Madelung potential calculation based on the structural data, and have found that orbital polarization governs the magnetic structure in bilayer manganites.
引用
收藏
页码：14153 / 14156
页数：4
相关论文
共 26 条
  • [1] Antiferromagnetic metallic state in doped manganites
    Akimoto, T
    Maruyama, Y
    Moritomo, Y
    Nakamura, A
    Hirota, K
    Ohoyama, K
    Ohashi, M
    [J]. PHYSICAL REVIEW B, 1998, 57 (10) : R5594 - R5597
  • [2] CONSIDERATIONS ON DOUBLE EXCHANGE
    ANDERSON, PW
    HASEGAWA, H
    [J]. PHYSICAL REVIEW, 1955, 100 (02): : 675 - 681
  • [3] Sign reversal of the Mn-O bond compressibility in La1.2Sr1.8Mn2O7 below T-C: Exchange striction in the ferromagnetic state
    Argyriou, DN
    Mitchell, JF
    Goodenough, JB
    Chmaissem, O
    Short, S
    Jorgensen, JD
    [J]. PHYSICAL REVIEW LETTERS, 1997, 78 (08) : 1568 - 1571
  • [4] Unconventional magnetostriction in layered La1.2Sr1.8Mn2O7: Evidence for spin-lattice coupling above T-C
    Argyriou, DN
    Mitchell, JF
    Potter, CD
    Bader, SD
    Kleb, R
    Jorgensen, JD
    [J]. PHYSICAL REVIEW B, 1997, 55 (18): : 11965 - 11968
  • [5] Neutron-diffraction studies on the magnetic ordering process in the layered Mn perovskite La2-2xSr1+2xMn2O7 (x = 0.40, 0.45 and 0.48)
    Hirota, K
    Moritomo, Y
    Fujioka, H
    Kubota, M
    Yoshizawa, H
    Endoh, Y
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1998, 67 (10) : 3380 - 3383
  • [6] Pressure effects in manganites with layered perovskite structure
    Ishihara, S
    Okamoto, S
    Maekawa, S
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1997, 66 (10) : 2965 - 2968
  • [7] IUZMI F, 1993, RIETVELD METHOD, pCH13
  • [8] KIM YI, 1994, NIPPON SERAM KYO GAK, V102, P401, DOI 10.2109/jcersj.102.401
  • [9] Interplane tunneling magnetoresistance in a layered manganite crystal
    Kimura, T
    Tomioka, Y
    Kuwahara, H
    Asamitsu, A
    Tamura, M
    Tokura, Y
    [J]. SCIENCE, 1996, 274 (5293) : 1698 - 1701
  • [10] KUBOTA M, UNPUB
123