Magnetic properties of trigonal GdFe3(BO3)4

Balaev, A. D.; Безматерных, Л. Н.; Гудим, И. А.; Temerov, V. L.; Овчинников, С. Г.; Kharlamova, S. A.

doi:10.1016/s0304-8853(02)01134-4

Cited by 88 publications

(66 citation statements)

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“…Such a field dependence of the temperature anomaly peak position is observed in systems with the spin-reorientation transition (see, for example, [24]). As the magnetic field is increased, the temperature of spin reorientation lowers.…”

Section: Fig 8 Specific Heat Curves (H=0)mentioning

confidence: 77%

Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Moshkina¹,

Ritter²,

Еремин³

et al. 2017

J. Phys.: Condens. Matter

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Abstract-We report on the thermodynamic, magnetic properties and the magnetic structure of ludwigite-type Cu 2 MnBO 5 . The specific heat, the low-field magnetization and the paramagnetic susceptibility were studied on a single crystal and combined with powder neutron diffraction data. The temperature dependence of the specific heat and the neutron diffraction pattern reveal a single magnetic phase transition at T=92 K, which corresponds to the magnetic ordering into a ferromagnetic phase. The cation distribution and the values and directions of magnetic moments of ions in different crystallographic sites are established. The magnetic moments of Cu 2+ and Mn 3+ ions occupying different magnetic sites in the ferrimagnetic phase are pairwise antiparallel and their directions do not coincide with the directions of the principal crystallographic axes.The small value of the magnetic moment of copper ions occupying site 2a is indicative of partial disordering of the magnetic moments on this site. The magnetization measurements show a strong temperature hysteresis of magnetization, which evidences for field-dependent transitions below the phase transition temperature.

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Section: Fig 8 Specific Heat Curves (H=0)mentioning

confidence: 77%

Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Moshkina¹,

Ritter²,

Еремин³

et al. 2017

J. Phys.: Condens. Matter

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“…If H is aligned with the c axis, the spin reorientation transition is suppressed and T SR quickly decreases with H c in accordance with recent magnetic data. 9 However, T M is barely affected by H c , and the separation of both anomalies increases in magnetic fields as shown in Fig. 2.…”

mentioning

confidence: 83%

“…9 The transparent crystal ͑shining green in color͒ was analyzed and oriented using a GADDS x-ray diffractometer. The heat capacity data was acquired via Quantum Design's physical property measurement system ͑PPMS͒ under the application of magnetic fields of up to 6 kOe both along the a and c axes ͑we use the hexagonal coordinate system in which a Ќ c͒.…”

mentioning

confidence: 99%

Magnetic field effect and dielectric anomalies at the spin reorientation phase transition ofGdFe3(BO3)4

et al. 2006

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GdFe 3 ͑BO 3 ͒ 4 exhibits a structural phase transition at 156 K, antiferromagnetic order of the Fe 3+ moments at 36 K, followed by a spin reorientation phase transition at 9 K. The reorientation phase transition is studied through dielectric, magnetic, and heat capacity measurements under the application of external magnetic fields of up to 7 kOe. The dielectric constant indicates the existence of two distinct anomalies at T SR = 9 K that separate in temperature under external magnetic fields. The spin rotation phase transition is proven to be of the first-order nature through the magnetic analog of the Clausius-Clapeyron equation. Magnetodielectric effect of up to 1% is observed at 8 K and 7 kOe. The uniaxial magnetocaloric effect along the c axis is observed below the spin reorientation phase transition of 9 K. GdFe 3 ͑BO 3 ͒ 4 belongs to the trigonal system with space group R32. It is similar to huntite CaMg 3 ͑CO 3 ͒ 4 , a trigonal trapezohedral structure that is one of the five trigonal types. Borate crystals of this category are appealing because of their possible applications as single crystal minilasers due to their good luminescent and nonlinear optical properties. In particular for GdFe 3 ͑BO 3 ͒ 4 single crystals, recent studies have focused on the better understanding of its optical properties, and at the same time on its magnetic properties through phase matching of absorption and second harmonic generation spectra. 1,2 The magnetic properties of the rareearth iron borates are also of fundamental interest because of the existence and mutual interference of two magnetic subsystems ͑Fe and Gd͒. The understanding of the magnetic orders of the gadolinium and iron sublattices, and the coupling between the iron spins and the gadolinium moments that contributes to the crystal's rich magnetic properties is of fundamental importance.The crystal structure of huntite has been analyzed and described elsewhere, 3-5 it consists of GdO 6 bipyramids and FeO 6 octahedrons. The octahedrons form threefold helicoidal chains along the c axis. The bipyramids are located between three nearly equal distant octahedrons. Rare-earth iron borates, RFe 3 ͑BO 3 ͒ 4 ͑R =Eu to Ho, and Y͒, undergo a structural transition at higher temperatures and an antiferromagnetic ͑AFM͒ transition involving the Fe spins at T N Ϸ 35 K. 6 For R = Gd a weakly first-order structural phase transition at T 1 = 156 K changes the structural symmetry from R32 to P3 1 2 1 . 5 A second-order phase transition at T N = 36 K results in the AFM ordering of the Fe 3+ magnetic moments aligned in the basal plane. At T SR = 9 K, another sharp phase transition occurs characterized by a spin reorientation of the Fe 3+ magnetic moments by 90°from the basal plane to the c axis.The coupling between the Gd moments and the Fe spins at low temperatures is strong in GdFe 3 ͑BO 3 ͒ 4 and it was speculated that the reorientation of the AFM iron spin system is triggered by the anisotropy of the Gd moments aligned with the c axis. 6 This exchange interaction is indirect and ...

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“…However, there is additional intensity close to the first Bragg peak (1,0,1) which is visible as a shoulder towards higher scattering angles. It may be due to a trace of Nd(OH) 3 . Otherwise the sample seems to be the expected single phase borate material.…”

Section: Powder X-ray and Neutron Diffraction Refinements Of The Chemmentioning

confidence: 99%

“…refs. [1,2], and with respect to interesting magnetic properties due to competing magnetic sublattices and magnetoelectric interactions [3][4][5][6], the family of borates RM 3 (BO 3 ) 4 with R = rare earths or Y, La-Lu and M = Al, Ga, Cr, Fe, Sc is of current interest. GdFe 3 (BO 3 ) 4 has been found [6,7] to exhibit a structural phase transition at 156 K, antiferromagnetic order of the magnetic Fe 3+ moments at 36 K, followed by a spin reorientation phase transition at 9 K. Moreover there is evidence for an induced ferroelectric phase in this material in external magnetic fields which demonstrates a strong correlation between the magnetic order and the dielectric properties of GdFe 3 (BO 3 ) 4 .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous antiferromagnetic Fe³⁺and Nd³⁺ordering in NdFe₃(¹¹BO₃)₄

Fischer

Pomjakushin

Sheptyakov

et al. 2006

J. Phys.: Condens. Matter

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Magnetic properties of trigonal GdFe3(BO3)4

Cited by 88 publications

References 2 publications

Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Magnetic field effect and dielectric anomalies at the spin reorientation phase transition ofGdFe3(BO3)4

Simultaneous antiferromagnetic Fe³⁺and Nd³⁺ordering in NdFe₃(¹¹BO₃)₄

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Magnetic properties of trigonal GdFe3(BO3)4

Cited by 88 publications

References 2 publications

Magnetic structure of Cu2MnBO5 ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Magnetic structure of Cu2MnBO5 ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Magnetic field effect and dielectric anomalies at the spin reorientation phase transition ofGdFe3(BO3)4

Simultaneous antiferromagnetic Fe3+and Nd3+ordering in NdFe3(11BO3)4

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Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Magnetic structure of Cu₂MnBO₅ ludwigite: thermodynamic, magnetic properties and neutron diffraction study

Simultaneous antiferromagnetic Fe³⁺and Nd³⁺ordering in NdFe₃(¹¹BO₃)₄