Abstract
The effect of non-magnetic impurities on the thermodynamics of a classical helimagnetic chain with antiferromagnetic nearest-neighbour interactions and next-nearest-neighbour interactions is studied by means of the transfer matrix method. The results for the partition function and the nearest-neighbour and the next-nearest-neighbour spin correlation functions are obtained exactly for both the isotropic Heisenberg model and the planar model as functions of temperature and concentration of non-magnetic impurities. The magnetic susceptibility is calculated up to terms linear in the concentration. It is found that a non-magnetic impurity modifies the helical spin structure in its vicinity and leads consequently to the formation of a new local equilibrium spin structure, which is called a spin complex. The consequences of this peculiar spin complex on the thermodynamics, especially on the spin correlation functions, are extensively discussed in connection with experimental results on FeMgBO 4.
| Original language | English |
|---|---|
| Article number | 015 |
| Pages (from-to) | 953-967 |
| Number of pages | 15 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 2 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1990 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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Thermodynamics and correlations of a helical spin chain with non-magnetic impurities. / Harada, I.; Mikeska, H. J.
In: Journal of Physics Condensed Matter, Vol. 2, No. 4, 015, 1990, p. 953-967.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermodynamics and correlations of a helical spin chain with non-magnetic impurities
AU - Harada, I.
AU - Mikeska, H. J.
PY - 1990
Y1 - 1990
N2 - The effect of non-magnetic impurities on the thermodynamics of a classical helimagnetic chain with antiferromagnetic nearest-neighbour interactions and next-nearest-neighbour interactions is studied by means of the transfer matrix method. The results for the partition function and the nearest-neighbour and the next-nearest-neighbour spin correlation functions are obtained exactly for both the isotropic Heisenberg model and the planar model as functions of temperature and concentration of non-magnetic impurities. The magnetic susceptibility is calculated up to terms linear in the concentration. It is found that a non-magnetic impurity modifies the helical spin structure in its vicinity and leads consequently to the formation of a new local equilibrium spin structure, which is called a spin complex. The consequences of this peculiar spin complex on the thermodynamics, especially on the spin correlation functions, are extensively discussed in connection with experimental results on FeMgBO 4.
AB - The effect of non-magnetic impurities on the thermodynamics of a classical helimagnetic chain with antiferromagnetic nearest-neighbour interactions and next-nearest-neighbour interactions is studied by means of the transfer matrix method. The results for the partition function and the nearest-neighbour and the next-nearest-neighbour spin correlation functions are obtained exactly for both the isotropic Heisenberg model and the planar model as functions of temperature and concentration of non-magnetic impurities. The magnetic susceptibility is calculated up to terms linear in the concentration. It is found that a non-magnetic impurity modifies the helical spin structure in its vicinity and leads consequently to the formation of a new local equilibrium spin structure, which is called a spin complex. The consequences of this peculiar spin complex on the thermodynamics, especially on the spin correlation functions, are extensively discussed in connection with experimental results on FeMgBO 4.
UR - http://www.scopus.com/inward/record.url?scp=36149029336&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36149029336&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/2/4/015
DO - 10.1088/0953-8984/2/4/015
M3 - Article
AN - SCOPUS:36149029336
VL - 2
SP - 953
EP - 967
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 4
M1 - 015
ER -