Antiferromagnetic domains and the spin-flop transition of MnF
                    <sub>2</sub>

Felcher, G. P.; Kleb, R.

doi:10.1209/epl/i1996-00251-7

Cited by 32 publications

(18 citation statements)

References 14 publications

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“…This conclusion is in agreement with some other uniaxial antiferromagnets, where the maximum tilt angle at which a first order spin-flop transition between the AFM easy axis and the spin-flop axis can be observed ͑ max ͒ has a magnitude of less than 1°. 4,5,7,34 This is indeed much smaller than the value of max = 20°± 5°seen in Gd 5 Ge 4 , especially considering the possible misalignment of the field vector with respect to the crystallographic direction͑s͒. As pointed out by Rohrer and Thomas, 34 the maximum tilt angle can be expressed as max = 28.6°ϫ H an / H ex when K 1 = 0.…”

Section: Figures 2 Andmentioning

confidence: 78%

“…4,5,7,34 Here, we investigate angular dependence of the spin-flop transition in Gd 5 Ge 4 . In addition, owing to the distinctly layered crystal structure of Gd 5 Ge 4 , a different behavior is expected when the magnetic field is tilted away from the c axis ͑AFM easy axis͒ toward the b axis when compared to the magnetic field tilted away from the c axis toward the a axis.…”

Section: Introductionmentioning

confidence: 99%

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Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

et al. 2007

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The angular dependence of the spin-flop transition in Gd 5 Ge 4 has been examined by magnetization measurements of a single crystal. When the magnetic field vector is tilted away from the antiferromagnetic easy axis ͑c axis͒ toward the b axis, the spin-flop transition always remains first order in nature. However, when the field vector is tilted away from the c axis toward the a axis, the first order spin-flop transition is only observed over a narrow range of tilt angles ͑0 Ͻ Ͻ 20°͒, which serves as evidence that the Gd moments "flop" from the c axis to the a axis during the spin-flop transformation.

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Section: Figures 2 Andmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

et al. 2007

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“…The expansion for B z is close to zero. In stark contrast to classical antiferromagnets [31,32], there is no discernible field hysteresis of the forced magnetostriction which would indicate pinning of antiferromagnetic domain walls.…”

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confidence: 75%

Magnetostriction and Magnetostructural Domains in AntiferromagneticYBa2Cu3O6
Náfrádi
¹
,
Keller
²
,
Hardy³
et al. 2016
Phys. Rev. Lett.
18
0
11
0
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We have used high-resolution neutron Larmor diffraction and capacitative dilatometry to investigate spontaneous and forced magnetostriction in undoped, antiferromagnetic YBa2Cu3O6.0, the parent compound of a prominent family of high-temperature superconductors. Upon cooling below the Néel temperature, TN = 420 K, Larmor diffraction reveals the formation of magneto-structural domains of characteristic size ∼ 240 nm. In the antiferromagnetic state, dilatometry reveals a minute (4 × 10 −6 ) orthorhombic distortion of the crystal lattice in external magnetic fields. We attribute these observations to exchange striction and spin-orbit coupling induced magnetostriction, respectively, and show that they have an important influence on the thermal and charge transport properties of undoped and lightly doped cuprates.Correlated-electron systems exhibit multiple collective ordering phenomena whose interdependence and competition are subjects of intense current research. The macroscopic properties of materials with strongly correlated electrons are influenced not only by atomic-scale correlations, but also by emergent domain structures on nanoscopic and mesoscopic length scales [1]. Recent advances in research on some of the most prominent correlated-electron materials, the cuprate hightemperature superconductors, [2] have reinforced efforts to establish quantitative links between the doping dependent spin and charge correlations and the thermodynamic and transport properties [3][4][5]. These efforts are, however, complicated by the presence of defects and associated strains of the crystal lattice, which are invariably associated with doping and strongly affect the mesoscopic organization of the electron system [6]. Recent examples include magnetic hysteresis phenomena [7,8] and charge density wave pinning [9][10][11] in moderately doped superconducting cuprates, whose origins have not yet been conclusively identified.To provide a solid basis for the investigation of doped high-temperature superconductors, it is important to establish a firm understanding of electronic correlations and their coupling to the crystal lattice in the undoped, largely defect-free parent compounds that exhibit antiferromagnetic long-range order. Although the atomic-scale spin correlations of undoped cuprates are well understood, there is little direct information on antiferromagnetic domain structures and associated lattice strains, despite indications that they profoundly affect the charge [12,13] and heat [14,15] transport properties and may act as seeds for mesoscopic inhomogeneities in doped compounds [2,6]. In particular, an anomalous magnetoresistance has been reported for lightly doped, antiferromagnetic YBa 2 Cu 3 O 6+δ , [12,13] a material that has served as a model compound for recent research on high-temperature superconductivity [2]. The magnetoresistance in the CuO 2 -planes was found to exhibit a "dwave" symmetry upon rotation of the magnetic field in this plane, that is, the resistance increases (decreases) when the magnetic field ...

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“…While this procedure worked well for the SF sample, the AGF sample exhibits a noteworthy difference in curvature between the low-field VSM data and the pulsed-field data, which could not be resolved. The magnetic field was determined by an additional set of pick-up coils calibrated by measuring the magnetization of MnF 2 , which exhibits a well-known spin-flop transition at B = 9.27 T. 16,17 Preliminary resistance measurements have shown a roomtemperature resistivity of about 50 μ cm for the AGF samples, for the SF samples, the values vary between 65 and 95 μ cm. However, the residual resistance ratio is between two and three for all samples, hence they are poor metals.…”

Section: Experimental Details and Sample Characterizationmentioning

confidence: 99%

Magnetic phase diagram of CeAu2Ge2: High magnetic anisotropy due to crystal electric field

et al. 2011

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CeAu 2 Ge 2 single crystals (with tetragonal ThCr 2 Si 2 structure) have been grown in Au-Ge flux (AGF) as well as in Sn flux (SF). X-ray powder diffraction and EDX measurements indicate that in the latter case, Sn atoms from the flux are incorporated in the samples, leading to a decrease of the lattice constants by ≈0.3% compared to AGF samples. For both types of samples, a strong anisotropy of the magnetization M for the magnetic field B parallel and perpendicular to the c direction is observed with M || /M ⊥ ≈ 6-7 in low fields just above 10 K. This anisotropy is preserved to high fields and temperatures and can be quantitatively explained by crystal electric field effects. Antiferromagnetic ordering sets in around 10 K as previously found for polycrystalline samples. From the magnetization data of our single crystals we obtain the phase diagrams for the AGF and SF samples. The magnetic properties depend strongly on the flux employed. While the AGF samples exhibit a complex behavior indicative of several magnetic transitions, the SF samples adopt a simpler antiferromagnetic structure with a single spin-flop transition. This effect of a more ordered state induced by disorder in form of Sn impurities is qualitatively explained within the anisotropic next-nearest neighbor Ising (ANNNI) model, which assumes ferromagnetic and antiferromagnetic interactions in agreement with the magnetic structure previously inferred from neutron-scattering experiments on polycrystalline CeAu 2 Ge 2 by Loidl et al. [Phys. Rev. B 46, 9341 (1992)].

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Antiferromagnetic domains and the spin-flop transition of MnF ₂

Cited by 32 publications

References 14 publications

Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

Magnetostriction and Magnetostructural Domains in AntiferromagneticYBa2Cu3O6
Náfrádi
¹
,
Keller
²
,
Hardy³
et al. 2016
Phys. Rev. Lett.
18
0
11
0
View full text Add to dashboard Cite

Magnetic phase diagram of CeAu2Ge2: High magnetic anisotropy due to crystal electric field

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Antiferromagnetic domains and the spin-flop transition of MnF 2

Cited by 32 publications

References 14 publications

Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

Angular dependence of the spin-flop transition and a possible structure of the spin-flop phase ofGd5Ge4

Magnetostriction and Magnetostructural Domains in AntiferromagneticYBa2Cu3O6Náfrádi1, Keller2, Hardy3 et al. 2016Phys. Rev. Lett.180110View full textAdd to dashboardCite

Magnetic phase diagram of CeAu2Ge2: High magnetic anisotropy due to crystal electric field

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Antiferromagnetic domains and the spin-flop transition of MnF ₂

Magnetostriction and Magnetostructural Domains in AntiferromagneticYBa2Cu3O6
Náfrádi
¹
,
Keller
²
,
Hardy³
et al. 2016
Phys. Rev. Lett.
18
0
11
0
View full text Add to dashboard Cite