Elastic properties of magnetic materials

Lines, M. E.

doi:10.1016/0370-1573(79)90039-5

Cited by 32 publications

(11 citation statements)

References 100 publications

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“…Significant value of B might be provided by a magnetoelastic interaction. There are 13 elastic terms of the form of u ik u mn and 20 magnetoelastic terms of the form of u ik l m l n allowed by symmetry for Cu(pz) 2 (ClO 4 ) 2 [25]. From these terms we take for the magnetoelastic contribution to potential energy (B3) the following terms:…”

Section: Appendix B: Magnetoelastic Correctionmentioning

confidence: 99%

Switching of anisotropy and phase diagram of the Heisenberg square-latticeS=12antiferromagnet Cu(pz)2(ClO

2013

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Experiments in the antiferromagnetic phase of a quasi 2D S = 1/2 quasi-square lattice antiferromagnet Cu(pz)2(ClO4)2 reveal a biaxial type of the anisotropy, instead of the easy-plane one, considered before. The weak in-plane anisotropy, found by means of electron spin resonance spectroscopy and magnetization measurements, is about an order of magnitude weaker, than the off-plane anisotropy. The weak in-plane anisotropy results in a spin-flop phase transition for the magnetic field aligned along easy axis, and, thereby, in a bicritical point on the phase diagram. A remarkable feature of the weak in-plane anisotropy is the abrupt change of its sign at the spin-flop point. This anisotropy switching disappears at the tilting of magnetic field to the easy axis by the angle of 10• within the plane. The nature of the abrupt anisotropy reversal remains unclear. The phase diagram is characterized by the increase of the ordering temperature TN in the magnetic field used, except for a dip near the bicritical point.

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Section: Appendix B: Magnetoelastic Correctionmentioning

confidence: 99%

Switching of anisotropy and phase diagram of the Heisenberg square-latticeS=12antiferromagnet Cu(pz)2(ClO

2013

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“…This coupling results in certain spin-lattice effects both static (shifts of ion positions) and dynamic (coupling to phonons). Various aspects of magneto-elastic interactions have been addressed in a number of monographs [1][2][3][4][5] and reviews [6][7][8][9].…”

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confidence: 99%

Spin-lattice effects in selected antiferromagnetic materials (Review Article)

Жерлицын

Yasin

Wosnitza

et al. 2014

Low Temperature Physics

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Spin-lattice effects play an important role in many magnetic materials. In this short review, we give some examples of such effects studied in low-dimensional, frustrated as well as uranium-based antiferromagnets. Utilizing ultrasound measurements at low temperatures and high magnetic fields provides valuable information on the spin-strain interactions. Specifically phase transformations and critical phenomena in magnetic systems with strong spin-lattice interactions are fruitful grounds for sound-velocity and sound-attenuation measurements. PACS

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“…3 Therefore a true atomistic simulation of a magnetic materials at finite temperature has to conciliate the dynamics of both the spin and the lattice degrees of freedom. [4][5][6] From the Bohr-van Leeuwen theorem and without internal degrees of freedom, the magnetization of a classical system is always null. 7 Because magnetism is a quantum effect, the magnetic molecular dynamics (MMD) cannot mimic the magnetization dynamics without introducing the spins as supplemental dynamical variables.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic magnetic molecular dynamics of cobalt nanowires

2012

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An investigation of thermally induced spin and lattice dynamics of a cobalt nanowire on a (111)Pt substrate is presented via magnetic molecular dynamics. This dynamical simulation model treats each atom as a particle supporting a classical spin. A coordinate dependent on both exchange and anisotropic functions ensures a minimal coupling between the spin and the lattice degrees of freedom to translate the magnetostrictive behavior of most magnetic materials. A spin-pair model of anisotropy is proposed to connect to the lattice thermodynamics. In order to solve linked spin-coordinate equations of motion, the efficiencies of algorithms based on SuzukiTrotter decompositions are compared. The temperature dependence of the magnetic behavior of Co nanowires is investigated through thermal stochastic connections with mechanical and spin Langevin noises. From a magnetic Hamiltonian parametrized on ab initio calculations, the size dependence of the energy barriers and characteristic time scales of the magnetization relaxation are computed. In the superparamagnetic limit, it is shown that all spins in a nanowire evolve in a coherent rotation. When the size of the single nanowire increases, nucleations of domain walls let the activation energy be independent of the length of the wire.

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Elastic properties of magnetic materials

Cited by 32 publications

References 100 publications

Switching of anisotropy and phase diagram of the Heisenberg square-latticeS=12antiferromagnet Cu(pz)2(ClO

Switching of anisotropy and phase diagram of the Heisenberg square-latticeS=12antiferromagnet Cu(pz)2(ClO

Spin-lattice effects in selected antiferromagnetic materials (Review Article)

Anisotropic magnetic molecular dynamics of cobalt nanowires

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