Brand Anthropomorphism, Brand Reputation, and Consumer Engagement in the Distribution of Smartphone Brands

Ngoc Dan Thanh NGUYEN(Ngoc Dan Thanh NGUYEN ),Trong Phuc NGO(Trong Phuc NGO ),Ngoc Van MAI(Ngoc Van MAI ),Kim Ngan TRA(Kim Ngan TRA ),Tran Huy Hoang LE(Tran Huy Hoang LE ) 한국유통과학회 2023 유통과학연구 Vol.21 No.4

Purpose: This study aims to analyze the impact of Brand Anthropomorphism and Intimacy on Brand Engagement, and at the same time analyze the regulatory effect of Brand Reputation on the relationship between Brand Anthropomorphism and Intimacy and the relationship between Intimacy and Brand Engagement in terms of distribution brand. Results: The findings show that Brand Anthropomorphism, Intimacy, and Brand Reputation are important value factors in customers’ minds toward their behavior, and from there, they will contribute to creating positive emotions and interactions between consumers and brands. Research design, data, and methodology: This article used the quantitative technique utilizing PLS-SEM software to test the hypothesis with 1,060 samples. Collected data shows that consumers in Ho Chi Minh City have positive emotions and interactive and social behaviors toward smartphone brands. Conclusion: The study has demonstrated the conclusions and proposed solutions to help smartphone brands build Brand Anthropomorphism while enhancing Brand Reputation thereby achieving Intimacy, which leads to consumer Brand Engagement. In addition, this study complements the concept of Brand Anthropomorphism which is lacking in theoretical background and is the first study in Vietnam to explore the prefixes and suffixes of the concept of Brand Anthropomorphism and the regulatory role of Brand Reputation.

Magnetocaloric Effect in Fe-Ni-Zr Alloys Prepared by Using the Rapidly-quenched Method

Nguyen Huy Dan,Nguyen Huu Duc,Tran Dang Thanh,Nguyen Hai Yen,Ngac An Bang,Do Thi Kim Anh,판더롱,유성초 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12

Fe90−xNixZr10 (x = 0, 5, 10, 15, 20 and 25) ribbons with various thicknesses were prepared byusing a melt-spinning technique. The Curie temperature, TC, of the alloys dramatically decreasedfrom 960 K to room temperature at high quenching rates. When the alloys had an amorphousstructure, their TC strongly depended on the Ni concentration. The maximum entropy change,|Sm|max, with H = 12 kOe, of the alloys was around 1 J·kg−1K−1 at room temperature. Onthe other hand, the full width at half maximum the entropy-change peak was quite large, 85 K,which was suitable for applications in magnetic refrigerators at room temperature.

Influence of Co on the Structure and the Magnetic Properties of the Nd12-xCoxFe82B6 Alloy

Nguyen Huy Dan 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

The effect of Co-addition on the structure and the magnetic properties of Nd-Fe-B-based exchange spring magnets was investigated on the system of Nd₁₂-x}CoxFe82B6 (x = 0, 2, 4, 6 and 8) fabricated by using a melt-spinning method with different quenching rates. With appropriate concentrations of Co, the glass-forming ability (GFA) and the performance of the material could be significantly improved. The maximum energy product of 17.5 MGOe and a Curie temperature of about 640 K were achieved with Co-concentration of 4 %. The effect of Co-addition on the structure and the magnetic properties of Nd-Fe-B-based exchange spring magnets was investigated on the system of Nd₁₂-x}CoxFe82B6 (x = 0, 2, 4, 6 and 8) fabricated by using a melt-spinning method with different quenching rates. With appropriate concentrations of Co, the glass-forming ability (GFA) and the performance of the material could be significantly improved. The maximum energy product of 17.5 MGOe and a Curie temperature of about 640 K were achieved with Co-concentration of 4 %.

Critical behavior of the ferromagnetic-paramagnetic phase transition in Fe_90−xNi_xZr₁₀ alloy ribbons

Thanh, Tran Dang,Huy Dan, Nguyen,Phan, The-Long,Kumarakuru, Haridas,Olivier, Ezra J.,Neethling, Johannes H.,Yu, Seong-Cho American Institute of Physics 2014 JOURNAL OF APPLIED PHYSICS - Vol.115 No.2

Effect of Nb addition on the Microstructure and the Magnetic Properties of Nd-Fe-B-Based Nanocomposites

Doan Minh Thuy,Nguyen Huy Dan 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

Nd₁₂-xNbxFe82B6 alloys with x = 0, 1.5, 3 and 4.5 were prepared by using a melt-spinning method with dierent quenching rates. The microstructure of the materials was investigated by using X-ray diraction and electron microscopy techniques. The magnetic properties of the material were characterized by magnetic hysteresis and thermomagnetization measurements. The obtained results show that Nb can considerably reduce the critical quenching rate and eectively control the formation of nanocrystallites in the material. Coercivities larger 10 than kOe and maximum energy products above 13 MGOe can be achieved for the material with Nb-addition. Nd₁₂-xNbxFe82B6 alloys with x = 0, 1.5, 3 and 4.5 were prepared by using a melt-spinning method with dierent quenching rates. The microstructure of the materials was investigated by using X-ray diraction and electron microscopy techniques. The magnetic properties of the material were characterized by magnetic hysteresis and thermomagnetization measurements. The obtained results show that Nb can considerably reduce the critical quenching rate and eectively control the formation of nanocrystallites in the material. Coercivities larger 10 than kOe and maximum energy products above 13 MGOe can be achieved for the material with Nb-addition.

Investigation of the Microstructure of Mechanically Milled Nd40Fe30Co15Al10B5 Alloy

Luu Tien Hung,Nguyen Huy Dan 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

The microstructure of Nd40Fe30Co15Al10B5 alloys fabricated by using a high-energy ball-milling method was investigated by using high-resolution transmission electron microscopy (HRTEM), scan- ning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), selected area electron diraction (SAED) and electron backscatter diraction (EBSD) techniques. The crystalline phases found in the alloys were the tetragonal Nd2(Fe,Co,Al)14B (denoted as the 2 : 14 : 1 phase), the tetragonal Nd6(Fe,Co,Al)14 (denoted as the phase) and the fcc Nd-rich (a = 0.51 nm) phases. The formation of 2 : 14 : 1 crystallites supposedly contributed to the high coercivities up to 24 kOe for the alloys. The microstructure of Nd40Fe30Co15Al10B5 alloys fabricated by using a high-energy ball-milling method was investigated by using high-resolution transmission electron microscopy (HRTEM), scan- ning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), selected area electron diraction (SAED) and electron backscatter diraction (EBSD) techniques. The crystalline phases found in the alloys were the tetragonal Nd2(Fe,Co,Al)14B (denoted as the 2 : 14 : 1 phase), the tetragonal Nd6(Fe,Co,Al)14 (denoted as the phase) and the fcc Nd-rich (a = 0.51 nm) phases. The formation of 2 : 14 : 1 crystallites supposedly contributed to the high coercivities up to 24 kOe for the alloys.

Structure and Magnetic Properties of Nd45-xCxFe30Co15Al10 Alloys

Nguyen Anh Tuan,Vu Hong Ky,Nguyen Huy Dan,Luu Tien Hung 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

Nd45-xCxFe30Co15Al10 (x = 0, 1, 3, 5 and 7) alloys were prepared by using a copper mold suction casting method. X-ray diraction (XRD) patterns show a trend of increasing crystallinity with increasing C content. In addition, crystallites with dierent shapes and sizes are observed by using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). Multi-phase properties of the alloys are clearly exhibited on the magnetic measurements. The hysteresis loops of the lower C content alloys (x = 1 and 3) show a single-phase hard magnetic behavior with coercivities of 6.2 kOe while the loops of the higher C content alloys (x = 5 and 7) are supposing a multi-phase property with coercivities up to 7.2 kOe. Two magnetic-phase transitions, depending on the C concentration, appear in the thermomagnetization curves. Addition of C at low content (1 to 3 at.%) can improve the hard magnetic behavior of the Nd-(Fe, Co)-Al alloy. Nd45-xCxFe30Co15Al10 (x = 0, 1, 3, 5 and 7) alloys were prepared by using a copper mold suction casting method. X-ray diraction (XRD) patterns show a trend of increasing crystallinity with increasing C content. In addition, crystallites with dierent shapes and sizes are observed by using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). Multi-phase properties of the alloys are clearly exhibited on the magnetic measurements. The hysteresis loops of the lower C content alloys (x = 1 and 3) show a single-phase hard magnetic behavior with coercivities of 6.2 kOe while the loops of the higher C content alloys (x = 5 and 7) are supposing a multi-phase property with coercivities up to 7.2 kOe. Two magnetic-phase transitions, depending on the C concentration, appear in the thermomagnetization curves. Addition of C at low content (1 to 3 at.%) can improve the hard magnetic behavior of the Nd-(Fe, Co)-Al alloy.

Magnetic and magnetocaloric properties of Ni-Ag-Mn-Sn ribbons and their composites

Thanh, Tran Dang,Duc, Nguyen Huu,Dan, Nguyen Huy,Mai, N.T.,Phan, T.L.,Oh, S.K.,Yu, Seong-Cho Elsevier 2017 Journal of Alloys and Compounds Vol.696 No.-

<P><B>Abstract</B></P> <P>In this work, we have investigated the influence of Ag-doping on the magnetic and magnetocaloric effect (MCE) of Ni<SUB>50-x</SUB>Ag<SUB>x</SUB>Mn<SUB>37</SUB>Sn<SUB>13</SUB> ribbons with <I>x</I> = 1, 2, and 4, which were prepared by a melt-spinning method. With increasing Ag concentration, a systematic decrease in the antiferromagnetic interaction and in the magnetic phase transition temperatures was observed. Analyses of the critical behavior based on the Banerjee criterion and scaling hypothesis for <I>M</I>(<I>H</I>, <I>T</I>) data near the ferromagnetic-paramagnetic transformation prove an increase of Ag favors establishing long-range ferromagnetic interactions in the austenitic phase. The temperature and magnetic field dependences of magnetic entropy change, Δ<I>S</I> <SUB>m</SUB>(<I>T</I>, <I>H</I>) were investigated via isothermal magnetization measurements. Interestingly, these samples exhibit a MCE at room-temperature with the Δ<I>S</I> <SUB>m</SUB>(<I>T</I>) curves distributed over a quite wide temperature range. To enhance the relative cooling power (RCP) value and to extend the magnetic phase transition region, we have prepared the composites in the form of the layered material samples based on ribbons obtained above. Under Δ<I>H</I> = 10 kOe, the maximum value of Δ<I>S</I> <SUB>m</SUB> (denoted as |Δ<I>S</I> <SUB>max</SUB>|) at around room-temperature is 1.08 J kg<SUP>−1</SUP> K<SUP>−1</SUP>, corresponding to RCP = 51.8 J kg<SUP>−1</SUP>, which is about 10% higher than that obtained from a separate sample. Additionally, we also pointed out that the dependences of |Δ<I>S</I> <SUB>max</SUB>| on Δ<I>H</I> at around room-temperature for samples obey a power law, |Δ<I>S</I> <SUB>max</SUB>| = <I>a</I> × Δ<I>H</I> <SUP>n</SUP>, and all the Δ<I>S</I> <SUB>m</SUB>(<I>T</I>, <I>H</I>) data obey completely a universal master curve.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An increase of Ag in Ni<SUB>1-x</SUB>Ag<SUB>x</SUB>Mn<SUB>37</SUB>Sn<SUB>13</SUB> ribbons favors establishing long-range FM order in the austenitic phase. </LI> <LI> High magnetic entropy change, wide operative temperature range, and high RCP value around room-temperature. </LI> <LI> The composite of Ni<SUB>1-x</SUB>Ag<SUB>x</SUB>Mn<SUB>37</SUB>Sn<SUB>13</SUB> ribbons exhibits higher RCP value and extends the magnetic phase transition region. </LI> <LI> Field dependence of |Δ<I>S</I> <SUB>max</SUB>| can be expressed by the power law. </LI> <LI> All the Δ<I>S</I> <SUB>m</SUB>(<I>T, H</I>) data around room temperature are followed a universal master curve. </LI> </UL> </P>

Magnetic Properties and Magnetocaloric Effect at Room Temperature of Ni50−xAgxMn37Sn13 Alloys

Tran Dang Thanh,Nguyen Thi Mai,Nguyen Huy Dan,The-Long Phan,유성초 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.10

In this work, we present a detailed study of the magnetic properties and the magnetocaloric effectat room temperature of Ni50−xAgxMn37Sn13 alloys with x = 1, 2, and 4, which were prepared byusing an arc-melting method. Experimental results reveal that a partial replacement of Ag for Nileads to a decrease in the anti-FM phase in the alloys. In addition, the martensitic-austenitic phasetransition shifts towards lower temperature and is broaded. The Curie temperature (TAC ) for theaustenitic phase also shifts toward to lower temperature, but not by much. The Curie temperaturewas found to be 308, 305, and 298 K for x = 1, 2, and 4, respectively. The magnetic entropychange (Sm) of the samples was calculated by using isothermal magnetization data. Under anapplied magnetic field change of 10 kOe, the maximum value of Sm (|Smax|) was achieved ataround room temperature and did not change much (0.8 J·kg−1·K−1) with increasing Ag-dopingconcentration. Particularly, the M2 vs. H/M curves prove that all the samples exhibited a secondordermagnetic phase transition. Based on Landau’s phase-transition theory and careful analyses ofthe magnetic data around the TAC , we have determined the critical parameters ,, , and TC. Theresults show that the values are located between those expected for the 3D-Heisenberg model (= 0.365) and mean-field theory ( = 0.5). Such a result proves the coexistence of short-range andlong-range ferromagnetic interactions in Ni50−xAgxMn37Sn13 alloys. The nature of the changes inthe critical parameters and the |Smax| is thoroughly discussed by means of structural analyses.

Characterization of (Mn, Co)-Codoped ZnO Nanorods Prepared by Thermal Diffusion

The-Long Phan,Vincent, R.,Cherns, D.,Nguyen Huy Dan,Seong-Cho Yu IEEE 2009 IEEE transactions on magnetics Vol.45 No.6

<P>We prepared (Mn, Co)-codoped ZnO nanorods by thermal diffusion using pure ZnO nanorods, Mn and Co fragments as precursors. Detailed investigations of X-ray diffraction, electron microscopy, photoluminescence and Raman scattering spectroscopy revealed the incorporation of dopants Mn and Co into the ZnO host lattice. This did not change much the lattice parameters of ZnO, and not lead to the development of secondary phases related to the dopants. Compared with magnetic behaviors of two reference samples of Mn- and Co-doped ZnO nanorods, we observed the decrease of magnetic ordering in (Mn, Co)-codoped ZnO nanorods. This could be explained that magnetic interaction between Mn and Co ions is antiferromagnetic.</P>