MAGNETIC SHORT-RANGE ORDER AND MAGNETIC-MOMENTS OF CO-MN AND NI-MN ALLOYS

被引:16
作者
CABLE, JW [1 ]
TSUNODA, Y [1 ]
机构
[1] OSAKA UNIV,TOYONAKA,OSAKA 560,JAPAN
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 13期
关键词
D O I
10.1103/PhysRevB.50.9200
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The magnetic behavior of Co-Mn and Ni-Mn alloys is typical of competing interaction systems with regions of ferromagnetism and antiferromagnetism enclosing an intermediate concentration region in which only magnetic short-range order (MSRO) occurs. Neutron diffuse scattering measurements were made on alloys from this intermediate region to characterize the MSRO and to determine the associated magnetic moments. Diffuse peaks indicative of antiferromagnetic short-range order were observed and average sublattice moments were determined by comparison of the integrated diffuse peak intensities with the cross section for Bragg scattering from the alloys with assumed antiferromagnetic long-range order. The average sublattice moment of the Co-Mn alloys is appreciably smaller than that for the Ni-Mn alloys. Recent local density calculations indicate vanishing moments for Ni and Co atoms in fcc antiferromagnets with large wave vectors. If this applies to these alloys, then all of the moment resides at the Mn sites and corresponds to about 1mu(B)/Mn for the Co-Mn alloys and 4mu(B)/Mn for Ni-Mn alloys. This moment difference for these otherwise similar systems is attributed to a moment-volume instability of the type more commonly associated with fcc Fe.
引用
收藏
页码:9200 / 9207
页数:8
相关论文
共 21 条
[1]   MAGNETIC PHASE-DIAGRAM OF DISORDERED NI-MN NEAR THE MULTICRITICAL POINT [J].
ABDULRAZZAQ, W ;
KOUVEL, JS .
PHYSICAL REVIEW B, 1987, 35 (04) :1764-1767
[2]   NEUTRON-DIFFRACTION INVESTIGATIONS OF (COMN)1-XFEX [J].
ADACHI, K ;
SATO, K ;
MATSUI, M ;
MITANI, S .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1973, 35 (02) :426-433
[3]   A STUDY OF SOME ALLOYS OF GAMMA-MANGANESE BY NEUTRON DIFFRACTION [J].
BACON, GE ;
COWLAM, N .
JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1970, 3 (03) :675-&
[4]   MAGNETIC-STRUCTURE OF BCC AND FCC MANGANESE [J].
BRENER, NE ;
FUSTER, G ;
CALLAWAY, J ;
FRY, JL ;
ZHAO, YZ .
JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :4057-4059
[5]   MAGNETIC-MOMENT DISTRIBUTION IN NIMN ALLOYS [J].
CABLE, JW ;
CHILD, HR .
PHYSICAL REVIEW B, 1974, 10 (11) :4607-4615
[6]   NEUTRON-POLARIZATION-ANALYSIS STUDY OF THE SPIN STRUCTURE OF CU-MN SPIN-GLASSES [J].
CABLE, JW ;
WERNER, SA ;
FELCHER, GP ;
WAKABAYASHI, N .
PHYSICAL REVIEW LETTERS, 1982, 49 (11) :829-832
[7]   POLARIZATION-ANALYSIS STUDY OF THE ATOMIC AND SPIN-PAIR CORRELATIONS IN NI0.76MN0.24 [J].
CABLE, JW ;
NICKLOW, RM ;
TSUNODA, Y .
PHYSICAL REVIEW B, 1987, 36 (10) :5311-5315
[8]   NEUTRON STUDY OF THE MAGNETIC-MOMENT DISTRIBUTION IN CO-MN ALLOYS [J].
CABLE, JW .
PHYSICAL REVIEW B, 1982, 25 (07) :4670-4673
[9]   A DIFFRACTION STUDY OF GAMMA-MN-CU ALLOYS [J].
COWLAM, N ;
SHAMAH, AM .
JOURNAL OF PHYSICS F-METAL PHYSICS, 1981, 11 (01) :27-43
[10]   ANTIFERROMAGNETISM OF GAMMA-FEMN ALLOYS [J].
ISHIKAWA, Y ;
ENDOH, Y .
JOURNAL OF APPLIED PHYSICS, 1968, 39 (2P2) :1318-&