TEMPERATURE-DEPENDENCE OF THE MAGNETIC EXCITATIONS IN ORDERED AND DISORDERED FE72PT28

被引：17
作者：
ROSOV, N
LYNN, JW
KASTNER, J
WASSERMANN, EF
CHATTOPADHYAY, T
BACH, H
机构：
[1] UNIV DUISBURG,D-47057 DUISBURG,GERMANY
[2] RUHR UNIV BOCHUM,D-44780 BOCHUM,GERMANY
[3] UNIV MARYLAND,COLL PK,MD 20742
[4] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
来源：
JOURNAL OF APPLIED PHYSICS | 1994年 / 75卷 / 10期
关键词：
D O I：
10.1063/1.355461
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have performed inelastic neutron scattering measurements of the long-wavelength spin wave excitations of both ordered and disordered Fe72Pt28 single crystals below their critical temperatures, T(C)=510 and 375 K, respectively. The spin waves followed the expected E=Dq2 dependence,and the temperature-dependent spin stiffness D decreased as (T/T(C))5/2, as expected for an isotropic ferromagnet. The extrapolated zero-temperature spin stiffness was D = 98(4) meV angstrom2 and 107(1) meV angstrom2 for the disordered and ordered alloy, respectively. These values are significantly higher than the zero-temperature stiffness as determined by magnetization measurements.
引用
收藏
页码：6072 / 6074
页数：3
相关论文
共 10 条
[1]   RESOLUTION FUNCTION IN NEUTRON DIFFRACTOMETRY .I. RESOLUTION FUNCTION OF A NEUTRON DIFFRACTOMETER AND ITS APPLICATION TO PHONON MEASUREMENTS [J].
COOPER, MJ ;
NATHANS, R .
ACTA CRYSTALLOGRAPHICA, 1967, 23 :357-&
[2]   LONG-WAVELENGTH SPIN-WAVE ENERGIES AND LINEWIDTHS OF THE AMORPHOUS INVAR ALLOY FE100-XBX [J].
FERNANDEZBACA, JA ;
LYNN, JW ;
RHYNE, JJ ;
FISH, GE .
PHYSICAL REVIEW B, 1987, 36 (16) :8497-8511
[3]   LOW-ENERGY MAGNETIC FLUCTUATIONS IN AN ORDERED INVAR ALLOY OF FE3PT [J].
ISHIKAWA, Y ;
KOHGI, M ;
ONODERA, S ;
GRIER, BH ;
SHIRANE, G .
SOLID STATE COMMUNICATIONS, 1986, 57 (07) :535-538
[4]   MAGNETIC EXCITATIONS IN INVAR-ALLOYS, FE65NI35 AND FE3PT [J].
ISHIKAWA, Y ;
ONODERA, S ;
TAJIMA, K .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1979, 10 (2-3) :183-190
[5]   POLARIZATION ANALYSIS OF THE MAGNETIC EXCITATIONS IN INVAR AND NON-INVAR AMORPHOUS-ALLOYS [J].
LYNN, JW ;
ROSOV, N ;
FISH, G .
JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :5369-5371
[6]  
LYNN JW, J APPL PHYS
[7]  
LYNN JW, 1988, SPIN WAVES MAGNETI 2, P177
[8]  
Moon R. M., 1971, International Journal of Magnetism, V1, P219
[9]   CHARACTERISTIC MAGNETOVOLUME EFFECTS IN INVAR TYPE FE-PT ALLOYS [J].
SUMIYAMA, K ;
SHIGA, M ;
MORIOKA, M ;
NAKAMURA, Y .
JOURNAL OF PHYSICS F-METAL PHYSICS, 1979, 9 (08) :1665-1677
[10]   THE INVAR PROBLEM [J].
WASSERMANN, EF .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 100 (1-3) :346-362
1