Evidence of room temperature ferromagnetism in Co-doped transparent CuAlO2 semiconductor

Dong, Chengjun; Yu, Wenbo; Xu, Ming; Cao, Jiashu; Zhang, Y.; Chuai, Yahui; Wang, Y.D.

doi:10.1016/j.jallcom.2011.09.062

Cited by 26 publications

(8 citation statements)

References 32 publications

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“…Recently, it was reported on evidence of room temperature ferromagnetism in Co-doped transparent CuAlO 2 semiconductor [27]. Specially, the coercively (Hc) and saturation magnetization are significantly enhanced with Co composition [27]. In Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 93%

“…The interaction of the M cations with each other through Rh-O-Mn linkages of approximately 180• is expected to be the dominant consideration, and this would be antiferromagnetic in nature. Recently, it was reported on evidence of room temperature ferromagnetism in Co-doped transparent CuAlO 2 semiconductor [27]. Specially, the coercively (Hc) and saturation magnetization are significantly enhanced with Co composition [27].…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Amami

Hlil

Salah³

2016

J Supercond Nov Magn

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The CuRh 1−x Mn x O 2 (0.00 ≤ x ≤ 0.10) polycrystalline powders were synthesized by the direct solidstate reaction. The magnetic susceptibility was measured in the temperature range of 4-300 K. It was found that the magnetic susceptibility (χ ) increases rapidly with the doping of Rh 3+ by Mn 3+ ions with existence of paramagnetic substance at low temperature. For x = 0.1, a development of new antiferromagnetic (AF) transition around 26 K and the magnetic data for CuRh 1−x Mn x O 2 show evidence for weak ferromagnetic (FM) transition between 100 and 130 K. Clear hysteresis loops indicate that FM order exists in Mn-doped samples at 5 K. All samples behave like semiconductors. The ferromagnetism properties can be attributed to the double-exchange interaction between the Mn 3+ and Rh 3+ semiconductor compounds. We analyze the magnetic entropy change S M of CuRh 0.9 Mn 0.1 O 2 . Using Arrott plots, it was found that the phase transition for this sample at T N = 42 K is of second order. The maximum entropy change of ∼ 0.017 J/kg K upon a filed variation of ∼ 1 T and ∼ 0.076 J/kg K upon a filed variation of ∼ 5

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Section: Magnetic Propertiesmentioning

confidence: 93%

Section: Magnetic Propertiesmentioning

confidence: 99%

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Amami

Hlil

Salah³

2016

J Supercond Nov Magn

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“…Semiconductor quantum dots (QDs) have been investigated and have shown very unique properties, such as the quantum confined optical property [7][8][9][10][11][12][13]. They usually possess high photoluminescence (PL) quantum yield (QY) with size dependent tunable wavelength emissions, which makes them promising for light conversion [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Research on Ellipsoidal Structure Methane Gas Detection Based on Near Infrared Light Sources of PbSe Quantum Dots

Xing

Lei

Shang

et al. 2017

Journal of Nanomaterials

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To improve the precision and sensitivity of the detection in near infrared gas detection system, the selection of light source and design of gas chamber structure are two key links. In this paper, the near infrared (NIR) light sources fabricated with PbSe quantum dots (QDs) and a new gas cell structure using an ellipsoid reflector were designed to test the concentration of methane (CH4). The double wavelengths differential detection method was used in the paper. The signal wavelength is 1.665 μm from the NIR QD-based light source with 5.1 nm PbSe QDs. The reference wavelength is 1.943 μm from the NIR QD-based light source with 6.1 nm PbSe QDs. The experimental results show that the differential gain signal could be enhanced 80 times when the major axis, the focus, and the open length of the ellipsoid reflector are 4.18 cm, 3.98 cm, and 0.36 cm, respectively. The structure will be convenient for the signal amplifying, AD converting, and other process in the latter circuits, and therefore both the detection sensitivity and precision can be improved.

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“…Hence, after p-type CuAlO 2 was reported [10], a great deal of research has been done into this hot problem. Besides the above applications, CuAlO 2 has also been used as thermoelectric materials [11][12][13] and diluted magnetic semiconductors [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effects of different concentration S-doping on the structural stability and electronic structures of delafossite CuAlO2

Liu

2015

Computational Materials Science

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Evidence of room temperature ferromagnetism in Co-doped transparent CuAlO2 semiconductor

Cited by 26 publications

References 32 publications

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Theoretical Research on Ellipsoidal Structure Methane Gas Detection Based on Near Infrared Light Sources of PbSe Quantum Dots

Effects of different concentration S-doping on the structural stability and electronic structures of delafossite CuAlO2

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