Importance of in-plane anisotropy in the quasi-two-dimensional antiferromagnet BaNi2V2O8

Physical Review Letters

Volumn 99, Issue 13, 2007, Pages

  Knafo, W ^a,b   Meingast, C ^a   Grube, K ^a   Drobnik, S ^a,b   Popovich, P ^a,b   Schweiss, P ^a   Adelmann, P ^a   Wolf, Th ^a   Lohneysen H V ^a,b  

^a KARLSRUHE INSTITUTE OF TECHNOLOGY   (Germany)

^b UNIVERSITY OF KARLSRUHE   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

BARIUM ALLOYS; MAGNETIC ANISOTROPY; PHASE DIAGRAMS; PRESSURE EFFECTS; SPECIFIC HEAT;

BEREZINSKII-KOSTERLITZ-THOULESS BEHAVIOR; IN-PLANE ANISOTROPIES; MAGNETIC FIELDS APPLICATION;

ANTIFERROMAGNETIC MATERIALS;

EID: 34848844666     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.99.137206     Document Type: Article

References (16)

1. Magnetic Properties of Layered Transition Metal Compounds, edited by, L.J. DeJongh, (Kluwer Academic Publishers, Dordrecht/Boston/London, 1990).
2. V.L. Berezinskii, Zh. Eksp. Teor. Fiz. ZETFA7 0044-4510 59, 907 (1970)
3. [V.L. Berezinskii Sov. Phys. JETP 32, 493 (1971)]; SPHJAR 0038-5646
4. J.M. Kosterlitz and D.J. Thouless, J. Phys. C 6, 1181 (1973). JPSOAW 0022-3719 10.1088/0022-3719/6/7/010
5. P. Minnhagen, Rev. Mod. Phys. 59, 1001 (1987). RMPHAT 0034-6861 10.1103/RevModPhys.59.1001
6. A. Cuccoli, Phys. Rev. B PRBMDO 0163-1829 67, 104414 (2003). 10.1103/PhysRevB.67.104414
7. N. Rogado, Phys. Rev. B PRBMDO 0163-1829 65, 144443 (2002). 10.1103/PhysRevB.65.144443
8. M. Heinrich, Phys. Rev. Lett. 91, 137601 (2003). PRLTAO 0031-9007 10.1103/PhysRevLett.91.137601
9. Two spin wave gaps ΔXY□3 and ΔIP□0.2meV, related to the XY and in-plane anisotropies, respectively, were recently measured by neutron scattering [D. Reznik, S. Bayrakci, J. Lynn, and B. Keimer (private communication)]; using J□10meV and Δi∝DiJ, we estimate DXY□1 and DIP□4×10-3meV (to our knowledge, no experiment was able to estimate J′).
10. In W. Knafo, J. Magn. Magn. Mater. 310, 1248 (2007), a slight increase of TN for H∥c was associated to a field-induced XY anisotropy. JMMMDC 0304-8853 10.1016/j.jmmm.2006.10.384
11. The procedure proposed in J.C. Lashley, Cryogenics 43, 369 (2003) was used to enhance resolution. CRYOAX 0011-2275 10.1016/S0011-2275(03)00092-4
12. P. Bloembergen, Physica (Amsterdam) PHYBE3 0921-4526 10.1016/0378- 4363(76)90098-X 85B, 51 (1977).
13. This picture has been proposed in J. Villain and J.M. Loveluck, J. Phys. (Paris) 38, L77 (1977) for quasi-1D magnetic systems in a magnetic field. JOPQAG 0302-0738
14. Such phase diagrams were already obtained in I.W. Sumarlin, Phys. Rev. B PRBMDO 0163-1829 51, 5824 (1995) and 10.1103/PhysRevB.51.5824
15. B.J. Suh, Phys. Rev. Lett. PRLTAO 0031-9007 75, 2212 (1995) on the quasi-2D tetragonal magnetic systems Pr2CuO4 and Sr2CuO2Cl2, respectively. While Sumarlin et al. did not discuss the increase of TN(H), Suh et al. introduced a picture with a field-induced crossover from XY- to Ising-driven Néel ordering, which is quite different from our interpretation of the phase diagram. 10.1103/PhysRevLett.75.2212
16. In Y. Shapira, Phys. Rev. B PRBMDO 0163-1829 21, 1271 (1980), a similar phase diagram was obtained for the 3D hexagonal CsMnF3, being interpreted as a XY to Ising crossover (as in Suh et al.). An increase of TN(H) was also reported for quasi-2D systems with a single easy axis, although their phase diagram is somewhat different than ours (first order spin-flop transition instead of a spin alignment crossover). 10.1103/PhysRevB.21.1271